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A244720 Number of compositions of n with exactly 8 transitions between different parts. 2
1, 10, 77, 415, 1825, 6692, 21587, 62225, 164197, 401173, 919007, 1989942, 4102426, 8100013, 15388485, 28249241, 50273708, 87007800, 146783168, 241958083, 390411308, 617752456, 959909294, 1466853260, 2206861654, 3272535062, 4787597429, 6916184121, 9873403733 (list; graph; refs; listen; history; text; internal format)
OFFSET

13,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 13..900

MAPLE

b:= proc(n, v) option remember; `if`(n=0, [1, 0$8],

      add(`if`(v in [0, i], b(n-i, `if`(i<=n-i, i, -1)),

      [0, b(n-i, `if`(i<=n-i, i, -1))[1..8][]]), i=1..n))

    end:

a:= n-> b(n, 0)[9]:

seq(a(n), n=13..60);

CROSSREFS

Column k=8 of A238279.

Sequence in context: A225828 A000808 A159579 * A081678 A081182 A127536

Adjacent sequences:  A244717 A244718 A244719 * A244721 A244722 A244723

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Jul 04 2014

STATUS

approved

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Last modified May 29 03:31 EDT 2022. Contains 354122 sequences. (Running on oeis4.)