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 A131144 #5 Mar 31 2012 13:21:17 %S A131144 0,1,2,3,6,4,5,7,8,14,16,19,11,9,15,10,12,17,18,13,20,21,22,42,39,37, %T A131144 44,47,51,53,56,28,30,60,33,25,23,38,43,52,29,24,40,26,31,45,46,32,48, %U A131144 49,50,41,27,34,54,55,35,57,58,59,36,61,62,63,64,123,126,135,112,114 %N A131144 Signature permutation of a Catalan automorphism: row 6 of A122286. %C A131144 Derived from automorphism *A130344 with recursion scheme SPINE. %H A131144 A. Karttunen, <a href="/A131144/b131144.txt">Table of n, a(n) for n = 0..2055</a> %H A131144 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A131144 Inverse: A131143. %K A131144 nonn %O A131144 0,3 %A A131144 _Antti Karttunen_, Jun 20 2007