OFFSET
9,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 9..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(9, j)), j=0..n/i))), x, 10)
end:
a:= n-> coeff(b(n$2), x, 9):
seq(a(n), n=9..40);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 31 2015
STATUS
approved