Permutation of natural numbers: a(0) = 1, a(1) = 2, a(2n) = A273669(a(n)), a(2n+1) = A273664(a(n)).

Terms

a(0) =1a(1) =2a(2) =9a(3) =3a(4) =42a(5) =17a(6) =12a(7) =4a(8) =209a(9) =115a(10) =82a(11) =41a(12) =59a(13) =26a(14) =19a(15) =5a(16) =1042a(17) =801a(18) =572a(19) =444a(20) =409a(21) =283a(22) =202a(23) =57a(24) =292a(25) =180a(26) =129a(27) =48a(28) =92a(29) =31