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A244167 Number of compositions of n in which the minimal multiplicity of parts equals 4. 2
1, 0, 0, 0, 1, 0, 0, 0, 71, 126, 336, 330, 776, 841, 1541, 1821, 2951, 3221, 5322, 5697, 43288, 99626, 313917, 807218, 2049995, 4769054, 10240287, 22002219, 45015647, 90239153, 177239582, 342276724, 650127448, 1223160912, 2275920969, 4197371497, 7754873919 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,9

LINKS

Alois P. Heinz, Table of n, a(n) for n = 4..400

MAPLE

b:= proc(n, i, p, k) option remember; `if`(n=0, p!, `if`(i<1, 0,

      add(b(n-i*j, i-1, p+j, k)/j!, j=[0, $max(1, k)..n/i])))

    end:

a:= n-> b(n$2, 0, 4) -b(n$2, 0, 5):

seq(a(n), n=4..50);

CROSSREFS

Column k=4 of A242451.

Sequence in context: A141879 A323049 A026063 * A115395 A142647 A152951

Adjacent sequences:  A244164 A244165 A244166 * A244168 A244169 A244170

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 21 2014

STATUS

approved

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Last modified June 24 19:37 EDT 2021. Contains 345423 sequences. (Running on oeis4.)