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 A130381 #5 Mar 31 2012 13:21:14 %S A130381 0,1,2,3,5,6,4,7,8,12,13,15,16,19,9,14,10,18,20,11,17,21,22,32,34,31, %T A130381 35,36,40,41,43,44,47,52,53,56,60,24,25,37,42,51,23,38,27,49,50,29,55, %U A130381 57,61,28,39,26,45,54,30,46,59,62,33,48,58,63,64,91,92,97,99,103,87 %N A130381 Signature permutation of a Catalan automorphism: row 4 of A130400. %C A130381 The signature-permutation of the Catalan automorphism which is derived from the fourth non-recursive Catalan automorphism *A089851 with recursion schema INORDER (see A130400 for the definition). %H A130381 A. Karttunen, <a href="/A130381/b130381.txt">Table of n, a(n) for n = 0..2055</a> %H A130381 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130381 Inverse: A130382. %K A130381 nonn %O A130381 0,3 %A A130381 _Antti Karttunen_, Jun 11 2007