Period of Langton's ant on an n X 3 torus.

Terms

a(0) =6a(1) =8a(2) =66a(3) =72a(4) =954a(5) =196a(6) =208a(7) =3008a(8) =6064a(9) =304a(10) =69258a(11) =246400a(12) =400a(13) =29404a(14) =1366554a(15) =496a(16) =9463764a(17) =10930388a(18) =592a(19) =30519840a(20) =70930202a(21) =688a(22) =61628268a(23) =477526912a(24) =784a(25) =363496056a(26) =16882639776a(27) =880a(28) =95016238440a(29) =116172994252