cp's OEIS Frontend

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.

A079437 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071661.

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%I A079437 #12 Aug 13 2025 22:02:27
%S A079437 1,1,2,3,6,16,36,83,190,448,1056,2514,5872,13806,32424,76609,181434,
%T A079437 432062,1032716
%N A079437 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071661.
%C A079437 That is, number of orbits to which "Catalan bijections" A071661/A071662 partition each A000108(n) Catalan tree structures encoded in A014486[A014137(n-1)..A014138(n-1)].
%H A079437 Antti Karttunen, <a href="/A089408/a089408.c.txt">C-program for counting the initial terms of this sequence</a>
%Y A079437 Occurs in A073201 as row 13373289.
%Y A079437 Cf. A079438, A079439, A057507, A079441.
%K A079437 nonn,more
%O A079437 0,3
%A A079437 _Antti Karttunen_, Jan 27 2003