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 A130999 #5 Mar 31 2012 13:21:16 %S A130999 0,1,3,2,7,8,6,4,5,17,18,20,21,22,16,19,14,10,9,15,11,13,12,45,46,48, %T A130999 49,50,54,55,57,59,58,61,62,64,63,44,47,53,56,60,42,51,38,27,26,37,25, %U A130999 24,23,43,52,39,29,28,41,33,36,35,40,30,34,32,31,129,130,132,133,134 %N A130999 Signature permutation of a Catalan automorphism: row 15 of A122288. %C A130999 Derived from automorphism *A130359 with recursion scheme KROF. %H A130999 A. Karttunen, <a href="/A130999/b130999.txt">Table of n, a(n) for n = 0..2055</a> %H A130999 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130999 Inverse: A131000. %K A130999 nonn %O A130999 0,3 %A A130999 _Antti Karttunen_, Jun 20 2007