A079437 - OEIS

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A079437

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

1, 1, 2, 3, 6, 16, 36, 83, 190, 448, 1056, 2514, 5872, 13806, 32424, 76609, 181434, 432062, 1032716

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

I.e. 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)].

LINKS

Table of n, a(n) for n=0..18.

Antti Karttunen, C-program for counting the initial terms of this sequence

CROSSREFS

Occurs in A073201 as row 13373289. Cf. A079438, A079439, A057507, A079441.

Sequence in context: A030753 A003040 A126317 * A061220 A378076 A184322

Adjacent sequences: A079434 A079435 A079436 * A079438 A079439 A079440

KEYWORD

nonn,more

AUTHOR

Antti Karttunen, Jan 27 2003

STATUS

approved