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 A131155 #5 Mar 31 2012 13:21:17 %S A131155 0,1,3,2,8,6,7,5,4,22,19,21,14,15,20,16,17,11,13,18,12,10,9,64,60,63, %T A131155 52,51,62,56,58,40,37,59,38,41,39,61,53,57,42,43,54,44,45,29,28,46,33, %U A131155 35,36,55,47,48,30,34,49,31,25,27,50,32,26,24,23,196,191,195,177,178 %N A131155 Signature permutation of a Catalan automorphism: row 13 of A122285. %C A131155 Derived from automorphism *A130355 with recursion scheme ENIPS. %H A131155 A. Karttunen, <a href="/A131155/b131155.txt">Table of n, a(n) for n = 0..2055</a> %H A131155 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131155 Inverse: A131156. %K A131155 nonn %O A131155 0,3 %A A131155 _Antti Karttunen_, Jun 20 2007