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 A131010 #5 Mar 31 2012 13:21:17 %S A131010 0,1,3,2,7,8,5,4,6,20,17,21,22,18,13,12,10,9,11,15,14,19,16,57,61,45, %T A131010 48,54,58,62,63,64,59,50,49,46,55,32,36,34,31,35,26,27,24,23,25,29,28, %U A131010 33,30,41,40,38,37,39,52,51,56,60,43,42,47,44,53,183,169,187,192,173 %N A131010 Signature permutation of a Catalan automorphism: row 17 of A122287. %C A131010 Derived from automorphism *A074686 with recursion scheme FORK. %H A131010 A. Karttunen, <a href="/A131010/b131010.txt">Table of n, a(n) for n = 0..2055</a> %H A131010 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131010 Inverse: A131009. %K A131010 nonn %O A131010 0,3 %A A131010 _Antti Karttunen_, Jun 20 2007