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 A130996 #5 Mar 31 2012 13:21:16 %S A130996 0,1,3,2,7,8,5,6,4,17,20,21,18,22,13,12,15,19,16,10,14,11,9,45,48,61, %T A130996 54,57,62,58,50,55,46,63,49,59,64,36,32,31,35,34,41,40,52,56,60,43,47, %U A130996 53,44,26,27,38,51,42,29,39,33,30,24,37,28,25,23,129,132,145,138,141 %N A130996 Signature permutation of a Catalan automorphism: row 18 of A122287. %C A130996 Derived from automorphism *A130356 with recursion scheme FORK. %H A130996 A. Karttunen, <a href="/A130996/b130996.txt">Table of n, a(n) for n = 0..2055</a> %H A130996 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130996 Inverse: A130995. %K A130996 nonn %O A130996 0,3 %A A130996 _Antti Karttunen_, Jun 20 2007