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 A130938 #5 Mar 31 2012 13:21:16 %S A130938 0,1,2,3,4,5,7,8,6,9,10,12,13,11,17,18,20,21,22,16,14,15,19,23,24,26, %T A130938 27,25,31,32,34,35,36,30,28,29,33,45,46,48,49,50,54,55,57,58,59,61,62, %U A130938 63,64,44,47,42,37,38,43,40,41,39,53,51,56,60,52,65,66,68,69,67,73,74 %N A130938 Signature permutation of a Catalan automorphism: row 6 of A130403. %H A130938 A. Karttunen, <a href="/A130938/b130938.txt">Table of n, a(n) for n = 0..2055</a> %H A130938 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130938 Inverse: A130937. %K A130938 nonn %O A130938 0,3 %A A130938 _Antti Karttunen_, Jun 11 2007