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 A130948 #5 Mar 31 2012 13:21:16 %S A130948 0,1,2,3,5,6,4,7,8,12,13,15,16,19,9,14,10,18,20,11,17,21,22,32,34,31, %T A130948 35,36,40,41,43,44,47,52,53,56,60,24,25,37,42,51,23,38,27,49,50,29,55, %U A130948 57,61,28,39,26,48,54,30,45,59,62,33,46,58,63,64,91,92,97,99,103,90 %N A130948 Signature permutation of a Catalan automorphism: row 11 of A130403. %H A130948 A. Karttunen, <a href="/A130948/b130948.txt">Table of n, a(n) for n = 0..2055</a> %H A130948 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130948 Inverse: A130947. %K A130948 nonn %O A130948 0,3 %A A130948 _Antti Karttunen_, Jun 11 2007