Permutation of natural numbers: a(n) = A078898(A003961(A003961(A003961(2*n)))).

Terms

a(0) =1a(1) =2a(2) =3a(3) =14a(4) =4a(5) =21a(6) =5a(7) =92a(8) =33a(9) =25a(10) =6a(11) =144a(12) =7a(13) =32a(14) =39a(15) =641a(16) =8a(17) =226a(18) =9a(19) =170a(20) =50a(21) =36a(22) =10a(23) =1007a(24) =46a(25) =43a(26) =355a(27) =223a(28) =11a(29) =267