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 A130342 #5 Mar 31 2012 13:21:14 %S A130342 0,1,2,3,5,4,6,7,8,13,12,11,9,10,15,14,16,17,18,19,20,21,22,36,35,34, %T A130342 31,32,33,30,28,23,24,29,25,26,27,41,40,39,37,38,43,42,44,45,46,47,48, %U A130342 49,50,52,51,53,54,55,56,57,58,59,60,61,62,63,64,106,105,104,100,101 %N A130342 Row 3 of A122204. %C A130342 The signature-permutation of the Catalan automorphism which is derived from the third non-recursive Catalan automorphism *A089850 with recursion schema ENIPS (see A122204 for the definition). This automorphism is also produced when automorphism *A069768 is applied to the right-hand side subtree of the given binary tree, with the left side left intact. %H A130342 A. Karttunen, <a href="/A130342/b130342.txt">Table of n, a(n) for n = 0..2055</a> %H A130342 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130342 Inverse: A130341. a(n) = A069770(A069768(n)). The number of cycles and the number of fixed points in range [A014137(n-1)..A014138(n-1)] of this permutation are given by A089404 and A073268. Cf. also A073287. %K A130342 nonn %O A130342 0,3 %A A130342 _Antti Karttunen_, Jun 05 2007