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 A130961 #5 Mar 31 2012 13:21:16 %S A130961 0,1,3,2,6,8,7,4,5,19,15,14,22,20,16,21,17,9,10,18,11,12,13,52,53,60, %T A130961 41,39,51,40,37,64,62,38,61,54,55,56,43,42,63,57,44,58,45,23,24,46,25, %U A130961 26,27,47,59,48,28,29,49,30,31,32,50,33,34,35,36,155,151,153,159,179 %N A130961 Signature permutation of a Catalan automorphism: row 18 of A130402. %H A130961 A. Karttunen, <a href="/A130961/b130961.txt">Table of n, a(n) for n = 0..2055</a> %H A130961 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130961 Inverse: A130962. %K A130961 nonn %O A130961 0,3 %A A130961 _Antti Karttunen_, Jun 11 2007