Binary Keith numbers, excluding positive powers of 2 that are larger than 1.

Terms

a(0) =1a(1) =3a(2) =143a(3) =285a(4) =569a(5) =683a(6) =1138a(7) =1366a(8) =2276a(9) =154203a(10) =308405a(11) =616810a(12) =678491a(13) =1356981a(14) =1480343a(15) =2713962a(16) =2960686a(17) =2212558911a(18) =4425117821a(19) =8850235641a(20) =17700471281a(21) =35400942561a(22) =37483350947a(23) =70801885122a(24) =74966701894a(25) =141603770244a(26) =149933403788a(27) =283207540488a(28) =299866807576