Permutation of natural numbers: a(n) = A243285(A122111(2*n)).

Terms

a(0) =1a(1) =2a(2) =4a(3) =3a(4) =8a(5) =6a(6) =18a(7) =5a(8) =11a(9) =14a(10) =38a(11) =10a(12) =79a(13) =30a(14) =22a(15) =7a(16) =164a(17) =15a(18) =337a(19) =20a(20) =47a(21) =64a(22) =694a(23) =16a(24) =35a(25) =134a(26) =26a(27) =43a(28) =1419a(29) =32