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A244719 Number of compositions of n with exactly 7 transitions between different parts. 2
2, 22, 136, 618, 2278, 7180, 20140, 51100, 120046, 263192, 545644, 1075414, 2031190, 3690972, 6485546, 11052982, 18333194, 29664162, 46934548, 72757550, 110684340, 165506866, 243561442, 353198516, 505188930, 713484770, 995688310, 1374225240, 1876917926 (list; graph; refs; listen; history; text; internal format)
OFFSET

12,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 12..900

MAPLE

b:= proc(n, v) option remember; `if`(n=0, [1, 0$7],

      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..7][]]), i=1..n))

    end:

a:= n-> b(n, 0)[8]:

seq(a(n), n=12..60);

CROSSREFS

Column k=7 of A238279.

Sequence in context: A330900 A353191 A062180 * A084399 A067057 A202738

Adjacent sequences:  A244716 A244717 A244718 * A244720 A244721 A244722

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Jul 04 2014

STATUS

approved

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Last modified May 18 10:28 EDT 2022. Contains 353807 sequences. (Running on oeis4.)