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 A126320 #5 Mar 31 2012 13:21:13 %S A126320 0,1,3,2,8,5,7,6,4,22,13,18,15,10,21,12,20,19,11,17,16,14,9,64,36,50, %T A126320 41,27,59,32,55,52,29,46,43,38,24,63,35,49,40,26,62,34,61,60,33,48,47, %U A126320 39,25,58,31,57,56,30,54,53,51,28,45,44,42,37,23,196,106,148,120,78 %N A126320 Signature-permutation of a self-inverse Catalan automorphism: A057163 conjugated by A057164. %H A126320 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A126320 a(n) = A057164(A057163(A057164(n))). Cf. A069787. Differs from A125980 for the first time at n=34, where a(n)=43, while A125980(n)=34. %K A126320 nonn %O A126320 0,3 %A A126320 _Antti Karttunen_, Jan 16 2007