I haven't done any statistical analysis, but my sense is that large period oscillators show up less often than low period ones. There's one exception: Period 2 oscillators are very rare in drifter searches, much less common than p3 or p4. I don't know why.dvgrn wrote:Not quite as easily, right? Is there some kind of power law governing how likely it is that a period-N oscillator will show up in a drifter search -- similar to the law governing the appearance of N-bit still lifes on Catagolue?Dean Hickerson wrote:... it could just as easily have been p19...
I haven't noticed anything like that. P.S.: Actually that's not true. Sometimes an oscillator will have a section with a lower period. For example, the p6 oscillator that I just posted in a reply to Scorbie (below) has 5 p3 cells which are needed to make it work. So probably composite periods are more common than nearby prime periods. It's not just an even-odd thing; I've also seen p9s supported by p3 parts.Maybe more interesting, is there an even-odd bias like the one for N-bit still lifes, that would make p19 relatively less likely?
I did a lot of them many years ago, as soon as I found the single 2c/3 to double 2c/3 turn. My copy of the knownrotors file has 33 "sep-3 fizzles" in it. The names of them refer to the pattern below; e.g. "sep-3 fizzle 0.4" means the one in the top row, rightmost column. (I don't remember why 2.2 is missing or why some lower rows have fewer than 5 patterns.)Are drifter searches starting with double 2c/3 signals feasible at all? And/or have they already been done?
Code: Select all
x = 140, y = 232, rule = B3/S23
6bo2bo19bo2bo18bo2bo18bo2bo15bo2bo$4b6o17b6o16b6o16b6o13b6o$3bo19b2obo
18b2obo18b2obo15b2obo$3bobob5o11b2obobob5o10b2obobob5o10b2obobob5o7b2o
bobob5o$2obobo6bo13bobo6bo12bobo6bob2obo7bobo6bo9bobo6bo$2obobobob4o
13bobobob4o12bobobob4obob2o7bobobob4o9bobobob4o$4b2obo7b2o10b2obo18b2o
bo18b2obo15b2obo7bo$7bo2b6o14bo2b5ob2o11bo2b4o15bo2b5o11bo2b8o$7bobo7b
o12bobo4bob2o11bobo4bo14bobo4bo11bobo8bo$6b2obo2b6o11b2obo2bobo13b2obo
2b2o2bo11b2obo2bo12b2obo2b6o$9bobo20bobob2o12bo3b2o2bob2o14bobob4o11bo
bo$9bobo2b4o14bobo15b2obo4bo17bobo4bo11bobo2b4o$10b2obo4bo14b2o16bob2o
bobo15b2o3b4o13b2obo4bo$13bo2b2obo31bo2bob2o16bo24bobo2bo$13bobo3bo32b
2o21bo3b2o18b2obob2o$14bo2b2o55b2o3b2o21bo2bo$15b2o85b2o$16bo$15bo$15b
2o3$6bo2bo22bo2bo22bo2bo22bo2bo19bo2bo$4b6o20b6o20b6o20b6o17b6o$2obo
22b2obo22b2obo22b2obo19b2obo$2obobob5o14b2obobob5o14b2obo2b6o14b2obobo
b5o11b2obobob5o$3bobo6bob2o13bobo6bo2b2o12bobo6bo16bobo6bo13bobo6bo$3b
obobob4ob2o13bobobob4o2b2o12bobobob4o2bo13bobobob4o3b2o8bobobob4o3b2o$
4b2obo22b2obo22b2obo7b3o12b2obo7bo2bo8b2obo7bo2bo$7bo2b6o17bo2b7o16bob
ob4o3bo14bo2b6o2bo11bo2b6o2bo$7bobo6bo16bobo7bo15bobo6b2obo13bobo6b2o
12bobo6b2o$6b2obo2b5o15b2obo2b6o14b2obo2b4obobo12b2obo2b3o14b2obo2b3o$
9bobo23bobo9b2o12bobo5bobobo13bobo3b3o14bobo3b3o$6b2obobo2b5o16bobo2b
4o4bo12bobo2b4o2bobo12bobo2bo3bobo11bobo2bo3bobo$6b2obobobo4bo15b2obob
o4bobo15b2obo4bobobo11b2obobo2b2ob2o10b2obobo2b2ob2o$10b2obobo2bob2obo
13bobobo2bob2o17bo2b2obobo14bobob2obo15bobob2obo$14bobobobob2o13bo2bob
obobo2bo15bobo3bo16bobo4bo15bobo4bo$16bobo8bo8b2o4bobo3b2o16bo2b2obo
14b2obob3o14bobobob3o$16bo2bo7b3o12bo2bo21b2o3bo15bo2bo16bobo3bo$17b2o
11bo12b2o24b3o14bobo3b3o13bo2b2obob2o$29bo2bob2o33bo16b2o6bo12b2o4bo2b
o$28bob3obobo76bobo2bo$16b2o11bo4bobo2bo2b2o70b2ob2o$16b2o12b5ob4o2b2o
73bo$35bo81bobo$32b2o2b2ob5o74b2o$32bo4b2o4bo$30bobo2bo4bo$30b2o3b6o2$
37b2o$37b2o3$6bo2bo16bo2bo54bo2bo26bo2bo$4b6o14b6o52b6o24b6o$2obo16b2o
bo57bo29bo$2obobob5o8b2obobob5o49bobob5o21bobob5o$3bobo6bo10bobo6bo45b
2obobo6bo12b2o3b2obobo6bo$3bobobob4o10bobobob4o2bo42b2obobobob4o12bo4b
2obobobob4o$4b2obo7bo8b2obo7b3o44b2obo7bo10bo7b2obo7bo7b2o$7bo2b6o11bo
2b5o3bo46bo2b8o7b2o10bo2b8o6bo$7bobo17bobo6b2o47bobo8bo3b2o13bobo8bo4b
o$6b2obo2b4o10b2obo2b4obobo44b2obo2b6o4bob3o9b2obo2b6o5b2o$9bobo4bo12b
obo5bob3o45bobo15bo11bobo$9bobobo2bo9b2obobo2b4o4bo44bobo2b6o6b2o11bob
o2b6o10b2o$7b2o3bobob2o8b2obobobo4b5o45b2obo5bo5bo14b2obo5bo5b2obo2bo$
7bo6bobo13b2obo2b2o53bo2b3o5bob2o15bo2b3o5bobob3o$8bo5bobo16bobo3b4o
45b2obobo5bo2bobo13b2obobo5bo2bobo$7b2o3bobob2o15bo2b3o4bo44b2obo2bo4b
4obo13b2obo2bo4b4ob3o$12b2o20b2o3bo2b2o48b2o9bo18b2o9bo3bo$35bob2obo
58b4o26b4o2b3o$30b2obobo2bob4o56bo29bo2b2o$30bob2ob2o2bo3bo54bo29bo4bo
2b2o$40bo57b2o28b2o4b2obo$39b2o8$6bo2bo23bo2bo22bo2bo22bo2bo24bo2bo$4b
6o21b6o20b6o20b6o22b6o$2obo23b2obo22b2obo22b2obo24b2obo$2obobob5o15b2o
bobob5o14b2obobob5o14b2obobob5o16b2obobob5o$3bobo6bo17bobo6bo16bobo6bo
16bobo6bo18bobo6bo$3bobobob4o17bobobob4o16bobobob4o16bobobob4o18bobobo
b4o$4b2obo7bo15b2obo7bo14b2obo7bo14b2obo7bo16b2obo7bo$7bo2b8o16bo2b8o
15bo2b8o15bo2b8o17bo2b8o$7bobo8bo15bobo8bo14bobo8bo14bobo8bo16bobo8bo$
6b2obo2b6o15b2obo2b6o14b2obo2b6o14b2obo2b6o16b2obo2b6o$9bobo24bobo23bo
bo23bobo25bobo$6b2obobo2b4o15b2obobo2b4o17bobo2b4o17bobo2b4o2b2o15bobo
2b4o2b2o$6b2obobobo4bo14b2obobobo4bo17b2obo4bo17b2obo4bo2bo2bo13b2obo
4bo2bo2bo$10b2obobo2bo18b2obobo2bo20bobo2bo2bo17bobo2b2obobobo15bobo2b
2obobobo$14bobobob2o19bobobob2o12b3obobobobobobo11b3obobobobo2bo2bo11b
3obobobobo2bo2bo$16bobob2o21bobob2o11bo2bobo3bobobo2bo9bo2bobo3bo3b2o
13bo2bobo3bo3b2o$16bobo24bobo14b2o3b2o2bo2bob2o10b2o3b2o2bo18b2o3b2o2b
o$17b2o25b2o18bo2bob2obobo15bo2bobobo20bo2bobobo$9b2o25b2o27b3obo2bo3b
o14b3obob3o19b3obob3o$9bo2bob2o20bo2bob2o25bo2b2o2b2o19bo3bo2b2o17bo5b
o$11b2obo5b2o16b2obo25bo23b5o2b2obo2bo16bo5b2o$12bobo6bo17bobo5b2obo
16b2o21bo8bobobo17b2o$12bob3o3bo16bo3b3o3bob2o39b2o2b2o3bobob2o$13bo3b
o2bobob2o11b4o3bo49b2o4bo$14b3obobob2obo15b4o$16bob2o17b2o2bo$37bobobo
b2o$40bo2bo$43bobo$44b2o3$6bo2bo22bo2bo22bo2bo22bo2bo$4b6o20b6o20b6o
20b6o$2obo22b2obo22b2obo22b2obo$2obobob5o14b2obobob5o14b2obobob5o14b2o
bobob5o$3bobo6bo16bobo6bo16bobo6bo16bobo6bo$3bobobob4o16bobobob4o16bob
obob4o16bobobob4o$4b2obo7bo14b2obo7bo14b2obo7bo14b2obo7bo$7bo2b8o15bo
2b8o15bo2b8o15bo2b8o$7bobo8bo14bobo8bo14bobo8bo14bobo8bo$6b2obo2b6o14b
2obo2b6o14b2obo2b6o14b2obo2b6o$9bobo23bobo23bobo23bobo$6b2obobo2b4o14b
2obobo2b4o14b2obobo2b4o14b2obobo2b4o$6b2obobobo4bob2o10b2obobobo4bob2o
10b2obobobo4bob2o10b2obobobo4bob2o$10b2obobo2bobo15b2obobo2bobo15b2obo
bo2bobo15b2obobo2bobo$14bobobo2bo18bobobo2bo18bobobo2bo18bobobo2bo$16b
ob2obo20bob2obo20bob2obo20bob2obo$16bo2bob2o19bo2bob2o14b2o3bo2bob2o
14b2o3bo2bob2o$17b2o4bo19b2o4bo13bo5b2o4bo13bo5b2o4bo$18bob3o21bob3o
11b2obo6bob3o11b2obo6bob3o$13b2o3bobo16bob2o3bobo14bobob2o3bobo14bobob
2o3bobo$14bo4bo15b3ob2o4bo15bobobo5bo15bobobo3b2o$11b3o20bo27b2obobo
20b2obobo3bo$11bo23b3ob2o25b2o24b5o$37bobo$37bobo54bo$38bo54bobo$94bo
8$6bo2bo23bo2bo23bo2bo23bo2bo$4b6o21b6o21b6o21b6o$2obo23b2obo23b2obo
23b2obo$2obobob5o15b2obobob5o15b2obobob5o15b2obobob5o$3bobo6bo2b2o13bo
bo6bo2b2o13bobo6bo2b2o13bobo6bo2b2o$3bobobob4o2b2o13bobobob4o2b2o13bob
obob4o2b2o13bobobob4o2b2o$4b2obo23b2obo23b2obo23b2obo$7bo2b7o17bo2b7o
17bo2b7o17bo2b7o$7bobo7bo16bobo7bo16bobo7bo16bobo7bo$6b2obo2b6o15b2obo
2b6o15b2obo2b6o15b2obo2b6o$9bobo24bobo24bobo24bobo$6b2obobo2b4o15b2obo
bo2b4o15b2obobo2b4o15b2obobo2b4o$6b2obobobo4bob2o11b2obobobo4bob2o11b
2obobobo4bob2o11b2obobobo4bob2o$10b2obobo2bobo16b2obobo2bobo16b2obobo
2bobo16b2obobo2bobo$14bobobo2bo19bobobo2bo19bobobo2bo19bobobo2bo$16bob
2obo21bob2obo21bob2obo21bob2obo$16bo4bob2o18bo4bob2o13b2o3bo4bob2o13b
2o3bo4b2o$17b2ob2ob2o19b2ob2ob2o13bo5b2ob2ob2o13bo5b2obo$18bobo24bobo
14b2obo6bobo14b2obo6bob3o$13b2o3bobo17bob2o3bobo15bobob2o3bobo15bobob
2o3bo4bo$14bo4bo16b3ob2o4bo16bobobo5bo16bobobo3b2o3b2o$11b3o21bo28b2ob
obo21b2obobo$11bo24b3ob2o26b2o25b5o$38bobo58bo$38bobo54b2o$39bo55b2o3$
6bo2bo23bo2bo$4b6o21b6o$2obo23b2obo$2obobob5o15b2obobob5o$3bobo6bo17bo
bo6bob2o$3bobobob4o17bobobob4ob2o$4b2obo7bo15b2obo$7bo2b6o18bo2b6o6b2o
$7bobo8bob2o12bobo6bo4bobo$6b2obo2b7ob2o11b2obo2b5o4bo$9bobo24bobo7bob
2o$9bobo2b8o14bobo2b6o$10b2obo8bo10b2obobobo7b2o2bo$13bo2b6o2bo8b2obob
obo2b5ob4o$13bobo5bob2o12b2obobo$12b2obo2bo2bo18bobo2b6o$15bobobobo18b
obobo5bo$15bobob2o20b2obob4o$14b2ob2o26bo$20b3o24bo$21bo2bo21b2o$19bo
3b2o$19b2o6$6bo2bo22bo2bo22bo2bo23bo2bo$4b6o20b6o20b6o21b6o$2obo22b2ob
o22b2obo23b2obo$2obobob5o14b2obobob5o14b2obobob5o15b2obobob5o$3bobo6bo
16bobo6bo16bobo6bo17bobo6bo$3bobobob4o16bobobob4o16bobobob4o17bobobob
4o$4b2obo7bo14b2obo7bo14b2obo7bo15b2obo7bo$7bo2b6o17bo2b6o17bo2b6o18bo
2b6o$7bobo6b2o15bobo6b2o15bobo24bobo$6b2obo2b4o2bo13b2obo2b4o2bo13b2ob
o2b4o17b2obo2b4o$4bo2bobobo4b2o12bo2bobobo4b2o12bo2bobobo4bob2obo9bo2b
obobo4bob2obo$4b2o3bobobo2bo13b2o3bobobo2bo13b2o3bobobo2bobob2o9b2o3bo
bobo2bobob2o$9bo2bobobo2b2o14bo2bobobo2b2o14bo2bobobo19bo2bobobo$7b3o
4bob2o2bo12b3o4bob2o2bo12b3o4bob2o16b3o4bob2o$6bo7bo2bobo12bo7bo2bobo
12bo7bo18bo7bo$6b2o7b2o2b2o11b2o7b2o2b2o11b2o7b2obo14b2o7b2obo$4b2o10b
obo11b2o10bobo11b2o10bob3o10b2o10bob3o$3bo2b4ob2o3bobo10bo2b4ob2o3bobo
10bo2b4ob2o3bo4bo8bo2b4ob2o3bo4bo$2bobo4bobobo3bo10bobo4bobobo3bo10bob
o4bobobo3b4o8bobo4bobobo3b4o$2bobob2obobobo14bobob2obobobo14bobob2obob
obo15bobob2obobobo$3b2o2bobobob3o13b2o2bobobob3o13b2o2bobobob3o3b2o9b
2o2bobobob3o3b2o$5bo2bobobo3bo14bo2bobobo3bo14bo2bobobo3bo3bo11bo2bobo
bo3bo2b2o$5b2obobobobo2bo13b2obobobo2b2o14b2obobobobo2bo2bobo9b2obobob
o2b2o$7bobob2ob2obo16bob2o21bobob2ob2obo3b2o12bob2o$7bobo3bo2bo17bo24b
obo3bo2bo18bo$8b2o3bobo17b2o25b2o3bobo18b2o$14bo51bo!