This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A334865 #6 Jun 11 2020 23:43:48 %S A334865 0,1,3,2,15,7,255,5,6,31,65535,11,4294967295,511,63,4, %T A334865 18446744073709551615,13,340282366920938463463374607431768211455,47, %U A334865 1023,131071,115792089237316195423570985008687907853269984665640564039457584007913129639935,23,30,8589934591,27,767 %N A334865 a(n) = A156552(A225546(n)). %H A334865 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A334865 a(n) = A156552(A225546(n)). %F A334865 a(n) = A054429(A334859(n)). %F A334865 For n > 1, A070939(a(n)) = A334871(n). %Y A334865 Inverse permutation of A334866. Composition of permutations A156552 and A225546, and also of A054429 and A334859. %Y A334865 Cf. A334871. %K A334865 nonn %O A334865 1,3 %A A334865 _Antti Karttunen_, Jun 08 2020