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 A130998 #5 Mar 31 2012 13:21:16 %S A130998 0,1,3,2,7,8,4,5,6,20,18,22,21,17,11,10,9,12,13,14,15,19,16,57,61,50, %T A130998 49,55,58,63,64,62,59,46,48,45,54,30,33,27,26,29,28,23,25,34,32,24,36, %U A130998 35,31,39,38,37,40,41,51,52,56,60,42,43,44,47,53,183,173,192,187,169 %N A130998 Signature permutation of a Catalan automorphism: row 19 of A122287. %C A130998 Derived from automorphism *A130358 with recursion scheme FORK. %H A130998 A. Karttunen, <a href="/A130998/b130998.txt">Table of n, a(n) for n = 0..2055</a> %H A130998 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130998 Inverse: A130997. %K A130998 nonn %O A130998 0,3 %A A130998 _Antti Karttunen_, Jun 20 2007