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 A126290 #6 Mar 31 2012 13:21:13 %S A126290 0,1,3,2,4,6,5,8,7,22,13,17,20,10,19,21,18,11,16,14,12,15,9,33,50,47, %T A126290 56,59,34,39,38,52,53,23,28,42,46,61,30,29,43,44,35,40,41,64,36,25,48, %U A126290 57,24,62,31,32,60,63,26,49,58,27,54,37,51,55,45,196,120,106,105,119 %N A126290 Signature-permutation of a Catalan automorphism: A069772-conjugate of A125976. %C A126290 This is a self-inverse permutation (involution) of the nonnegative integers. %H A126290 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A126290 a(n) = A069772(A125976(A069772(n))) = A069771(A125976(A069771(n))). %K A126290 nonn %O A126290 0,3 %A A126290 _Antti Karttunen_, Jan 02 2007