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 A131159 #5 Mar 31 2012 13:21:17 %S A131159 0,1,3,2,7,8,6,5,4,17,18,20,22,21,16,19,15,13,12,14,11,10,9,45,46,48, %T A131159 50,49,54,55,61,64,63,57,62,59,58,44,47,53,60,56,43,52,41,35,36,40,34, %U A131159 31,32,42,51,39,33,30,38,29,27,26,37,28,25,24,23,129,130,132,134,133 %N A131159 Signature permutation of a Catalan automorphism: row 15 of A122285. %C A131159 Derived from automorphism *A130359 with recursion scheme ENIPS. %H A131159 A. Karttunen, <a href="/A131159/b131159.txt">Table of n, a(n) for n = 0..2055</a> %H A131159 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131159 Inverse: A131160. %K A131159 nonn %O A131159 0,3 %A A131159 _Antti Karttunen_, Jun 20 2007