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 A131162 #5 Mar 31 2012 13:21:17 %S A131162 0,1,3,2,8,7,4,6,5,22,21,18,20,17,10,11,14,16,19,9,15,13,12,64,63,59, %T A131162 62,58,50,49,55,57,61,48,54,45,46,26,27,33,29,30,38,39,42,44,47,51,53, %U A131162 56,60,23,28,37,43,52,24,41,36,35,25,40,32,34,31,196,195,190,194,189 %N A131162 Signature permutation of a Catalan automorphism: row 20 of A122286. %C A131162 Derived from automorphism *A130362 with recursion scheme SPINE. %H A131162 A. Karttunen, <a href="/A131162/b131162.txt">Table of n, a(n) for n = 0..2055</a> %H A131162 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131162 Inverse: A131161. %K A131162 nonn %O A131162 0,3 %A A131162 _Antti Karttunen_, Jun 20 2007