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 A131151 #5 Mar 31 2012 13:21:17 %S A131151 0,1,2,3,4,5,8,7,6,9,10,11,12,13,21,22,20,17,18,19,16,14,15,23,24,27, %T A131151 26,25,28,29,30,31,32,33,34,35,36,58,59,64,63,62,57,61,54,45,46,55,48, %U A131151 49,50,56,60,53,44,47,51,42,37,38,52,43,41,40,39,65,66,67,68,69,77,78 %N A131151 Signature permutation of a Catalan automorphism: row 10 of A122285. %C A131151 Derived from automorphism *A130351 with recursion scheme ENIPS. %H A131151 A. Karttunen, <a href="/A131151/b131151.txt">Table of n, a(n) for n = 0..2055</a> %H A131151 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131151 Inverse: A131152. %K A131151 nonn %O A131151 0,3 %A A131151 _Antti Karttunen_, Jun 20 2007