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 A130983 #5 Mar 31 2012 13:21:16 %S A130983 0,1,2,3,5,6,4,7,8,13,15,12,16,19,9,14,10,18,20,11,17,21,22,36,41,35, %T A130983 43,52,31,40,32,47,53,34,44,56,60,25,37,24,42,51,23,38,27,50,55,29,49, %U A130983 57,61,28,39,26,45,54,30,46,59,62,33,48,58,63,64,106,120,105,125,153 %N A130983 Signature permutation of a Catalan automorphism: row 4 of A122287 and A122288. %C A130983 Derived from automorphism *A130343 with recursion scheme KROF or from automorphism *A130348 with recursion scheme FORK. %H A130983 A. Karttunen, <a href="/A130983/b130983.txt">Table of n, a(n) for n = 0..2055</a> %H A130983 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130983 Inverse: A130984. %K A130983 nonn %O A130983 0,3 %A A130983 _Antti Karttunen_, Jun 20 2007