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 A130989 #5 Mar 31 2012 13:21:16 %S A130989 0,1,2,3,4,5,7,8,6,9,10,13,11,12,17,18,20,21,22,16,14,15,19,23,24,25, %T A130989 26,27,35,36,33,28,29,34,31,32,30,45,46,49,50,48,54,55,57,58,59,61,64, %U A130989 62,63,44,47,42,37,38,43,40,41,39,53,51,56,60,52,65,66,68,69,67,70,71 %N A130989 Signature permutation of a Catalan automorphism: row 9 of A122288. %C A130989 Derived from automorphism *A130349 with recursion scheme KROF. %H A130989 A. Karttunen, <a href="/A130989/b130989.txt">Table of n, a(n) for n = 0..2055</a> %H A130989 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130989 Inverse: A130990. %K A130989 nonn %O A130989 0,3 %A A130989 _Antti Karttunen_, Jun 20 2007