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A258479
Number of partitions of n into two sorts of parts having exactly 9 parts of the second sort.
2
1, 11, 67, 298, 1080, 3379, 9453, 24204, 57658, 129335, 275693, 562454, 1104484, 2097247, 3865383, 6937016, 12154390, 20838939, 35029203, 57829458, 93897437, 150150058, 236723504, 368350864, 566187387, 860416074, 1293614426, 1925547270, 2839214222, 4149449828
OFFSET
9,2
LINKS
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(9, j)), j=0..n/i))), x, 10)
end:
a:= n-> coeff(b(n$2), x, 9):
seq(a(n), n=9..40);
CROSSREFS
Column k=9 of A256193.
Sequence in context: A201605 A268458 A001808 * A035041 A125591 A092841
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 31 2015
STATUS
approved