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 A131001 #5 Mar 31 2012 13:21:16 %S A131001 0,1,3,2,6,8,7,4,5,19,14,15,21,22,16,20,18,12,9,17,10,13,11,51,56,60, %T A131001 38,37,52,40,39,63,58,41,59,64,62,53,42,43,57,61,47,55,48,32,34,50,30, %U A131001 24,23,44,54,49,31,26,45,25,29,35,46,27,36,28,33,163,150,149,172,168 %N A131001 Signature permutation of a Catalan automorphism: row 16 of A122288. %C A131001 Derived from automorphism *A130361 with recursion scheme KROF. %H A131001 A. Karttunen, <a href="/A131001/b131001.txt">Table of n, a(n) for n = 0..2055</a> %H A131001 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131001 Inverse: A131002. %K A131001 nonn %O A131001 0,3 %A A131001 _Antti Karttunen_, Jun 20 2007