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 A130953 #5 Mar 31 2012 13:21:16 %S A130953 0,1,3,2,7,8,5,4,6,17,20,21,22,18,13,12,11,9,10,15,14,19,16,45,54,61, %T A130953 57,46,62,58,59,64,63,50,49,55,48,35,36,32,31,34,33,30,28,23,24,29,25, %U A130953 26,27,41,40,39,37,38,52,51,60,56,43,42,47,44,53,129,157,166,180,130 %N A130953 Signature permutation of a Catalan automorphism: row 13 of A130402. %H A130953 A. Karttunen, <a href="/A130953/b130953.txt">Table of n, a(n) for n = 0..2055</a> %H A130953 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130953 Inverse: A130954. %K A130953 nonn %O A130953 0,3 %A A130953 _Antti Karttunen_, Jun 11 2007