Permutation of natural numbers: a(n) = A243071(A245612(n)).

Terms

a(0) =0a(1) =1a(2) =7a(3) =3a(4) =30a(5) =63a(6) =4a(7) =2a(8) =8191a(9) =57a(10) =510a(11) =11a(12) =511a(13) =10a(14) =31a(15) =6a(16) =524286a(18) =131068a(19) =65532a(20) =1073741823a(21) =16381a(22) =8190a(23) =262143a(24) =508a(25) =248a(26) =65535a(27) =125a(28) =16a(29) =60a(30) =127