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 A131166 #5 Mar 31 2012 13:21:17 %S A131166 0,1,3,2,6,7,8,5,4,16,15,14,17,18,19,20,21,11,12,22,13,10,9,43,44,47, %T A131166 39,40,42,41,38,45,46,37,48,49,50,53,52,51,54,55,56,57,58,30,29,59,28, %U A131166 31,32,60,61,62,33,34,63,35,25,26,64,36,27,24,23,127,123,124,128,131 %N A131166 Signature permutation of a Catalan automorphism: row 14 of A122286. %C A131166 Derived from automorphism *A130366 with recursion scheme SPINE. %H A131166 A. Karttunen, <a href="/A131166/b131166.txt">Table of n, a(n) for n = 0..2055</a> %H A131166 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131166 Inverse: A131165. %K A131166 nonn %O A131166 0,3 %A A131166 _Antti Karttunen_, Jun 20 2007