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 A130986 #5 Mar 31 2012 13:21:16 %S A130986 0,1,2,3,4,5,6,8,7,9,10,11,12,13,14,15,19,22,21,16,20,17,18,23,24,25, %T A130986 27,26,28,29,30,31,32,33,34,36,35,37,38,39,40,41,51,52,60,64,63,56,62, %U A130986 58,59,42,43,53,61,57,44,54,45,46,47,55,48,49,50,65,66,67,68,69,70,71 %N A130986 Signature permutation of a Catalan automorphism: row 7 of A122287. %C A130986 The signature-permutation of the Catalan automorphism which is derived from automorphism *A122282 with recursion scheme FORK. %H A130986 A. Karttunen, <a href="/A130986/b130986.txt">Table of n, a(n) for n = 0..2055</a> %H A130986 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130986 Inverse: A130985. %K A130986 nonn %O A130986 0,3 %A A130986 _Antti Karttunen_, Jun 20 2007