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A244165 Number of compositions of n in which the minimal multiplicity of parts equals 2. 2
1, 0, 1, 0, 7, 10, 32, 31, 71, 77, 222, 342, 971, 1936, 4681, 9662, 19440, 38304, 76458, 143542, 281447, 536472, 1051100, 2039870, 4055916, 8030958, 16168611, 32510383, 65705473, 132895297, 269206168, 544002516, 1099360989, 2217243856, 4464684513, 8975720721 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,5

LINKS

Alois P. Heinz, Table of n, a(n) for n = 2..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, 2) -b(n$2, 0, 3):

seq(a(n), n=2..50);

CROSSREFS

Column k=2 of A242451.

Sequence in context: A102574 A317797 A284418 * A119169 A095756 A241251

Adjacent sequences:  A244162 A244163 A244164 * A244166 A244167 A244168

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 21 2014

STATUS

approved

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Last modified May 5 22:32 EDT 2021. Contains 343578 sequences. (Running on oeis4.)