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 A130965 #5 Mar 31 2012 13:21:16 %S A130965 0,1,3,2,6,7,8,4,5,16,14,15,17,18,19,22,21,9,10,20,11,12,13,42,44,47, %T A130965 37,38,43,41,40,45,46,39,48,49,50,60,51,52,63,62,56,64,58,23,24,59,25, %U A130965 26,27,53,61,57,28,29,54,30,31,32,55,33,34,35,36,126,121,122,128,131 %N A130965 Signature permutation of a Catalan automorphism: row 20 of A130402. %H A130965 A. Karttunen, <a href="/A130965/b130965.txt">Table of n, a(n) for n = 0..2055</a> %H A130965 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130965 Inverse: A130966. %K A130965 nonn %O A130965 0,3 %A A130965 _Antti Karttunen_, Jun 11 2007