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 A125977 #6 Mar 31 2012 13:21:12 %S A125977 0,1,2,3,4,6,7,5,8,9,14,16,11,19,17,20,12,10,15,21,18,13,22,23,37,42, %T A125977 28,51,44,53,30,25,39,56,47,33,60,45,54,57,48,61,31,40,26,24,38,43,34, %U A125977 29,52,58,62,49,46,55,35,32,27,41,63,59,50,36,64,65,107,121,79,149 %N A125977 Signature-permutation of a Catalan automorphism: composition of A057163 and A125976. %H A125977 A. Karttunen, <a href="/A125977/b125977.txt">Table of n, a(n) for n = 0..2055</a> %H A125977 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A125977 Inverse: A125978. a(n) = A057163(A125976(n)). The number of cycles, maximum cycle sizes and LCM's of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of this permutation are given by A126317, A126318 and A126319. The number of fixed points seems to be given by A123050 and fixed points themselves are probably given by A126312. Cf. also A126313-A126316. %Y A125977 Differs from A071661 for the first time at n=43, where a(n)=40, while A071661(43)=34. Differs from A071666 for the first time at n=34, where a(n)=47, while A071666(34)=48. %K A125977 nonn %O A125977 0,3 %A A125977 _Antti Karttunen_, Jan 02 2007