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 A130946 #5 Mar 31 2012 13:21:16 %S A130946 0,1,2,3,4,6,5,7,8,9,11,14,16,19,10,15,12,17,20,13,18,21,22,23,25,28, %T A130946 30,33,37,39,42,44,47,51,53,56,60,24,29,38,43,52,26,40,31,45,46,32,54, %U A130946 57,61,27,41,34,48,55,35,49,58,62,36,50,59,63,64,65,67,70,72,75,79,81 %N A130946 Signature permutation of a Catalan automorphism: row 8 of A130403. %H A130946 A. Karttunen, <a href="/A130946/b130946.txt">Table of n, a(n) for n = 0..2055</a> %H A130946 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130946 Inverse: A130945. %K A130946 nonn %O A130946 0,3 %A A130946 _Antti Karttunen_, Jun 11 2007