A258476 Number of partitions of n into two sorts of parts having exactly 6 parts of the second sort.

1, 8, 37, 129, 376, 966, 2258, 4901, 10024, 19509, 36438, 65653, 114753, 195144, 324164, 526911, 840581, 1317461, 2033445, 3092660, 4643571, 6885877, 10099775, 14655962, 21067353, 30002794, 42376093, 59364880, 82558632, 113985165, 156352359, 213082865

Offset

6,2

Links

Alois P. Heinz, Table of n, a(n) for n = 6..1000

Maple

b:= proc(n, i) option remember; series(`if`(n=0, 1,
      `if`(i<1, 0, add(b(n-i*j, i-1)*add(x^t*
       binomial(j, t), t=0..min(6, j)), j=0..n/i))), x, 7)
    end:
a:= n-> coeff(b(n$2), x, 6):
seq(a(n), n=6..40);

Crossrefs

Column k=6 of A256193.

Sequence in context: A296537 A052387 A001780 * A320754 A053296 A055799

Adjacent sequences: A258473 A258474 A258475 * A258477 A258478 A258479

Keyword

nonn

Author

Alois P. Heinz, May 31 2015

Status

approved