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.

A079441 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071663.

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%I A079441 #11 Aug 13 2025 22:55:12
%S A079441 1,1,1,4,7,24,48,128,259,646,1426,3458,7924,19054,44684,107586,255971,
%T A079441 617012,1482096
%N A079441 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071663.
%C A079441 That is, number of orbits to which "Catalan bijections" A071663/A071664 partition each A000108(n) Catalan tree structures encoded in A014486[A014137(n-1)..A014138(n-1)].
%H A079441 Antti Karttunen, <a href="/A089408/a089408.c.txt">C-program for counting the initial terms of this sequence</a>
%Y A079441 Occurs in A073201 as row 176609070820803.
%Y A079441 Cf. A057507, A079437, A079442, A079443.
%K A079441 nonn,more
%O A079441 0,4
%A A079441 _Antti Karttunen_, Jan 27 2003