Subgroups of nimber addition interpreted as binary numbers.

Terms

a(0) =1a(1) =3a(2) =5a(3) =9a(4) =15a(5) =17a(6) =33a(7) =51a(8) =65a(9) =85a(10) =105a(11) =129a(12) =153a(13) =165a(14) =195a(15) =255a(16) =257a(17) =513a(18) =771a(19) =1025a(20) =1285a(21) =1545a(22) =2049a(23) =2313a(24) =2565a(25) =3075a(26) =3855a(27) =4097a(28) =4369a(29) =4641