Josephus problem: survivors.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =2a(5) =4a(6) =5a(7) =4a(8) =8a(9) =8a(10) =7a(11) =11a(12) =8a(13) =13a(14) =4a(15) =11a(16) =12a(17) =8a(18) =12a(19) =2a(20) =13a(21) =7a(22) =22a(23) =2a(24) =8a(25) =13a(26) =26a(27) =4a(28) =26a(29) =29