OFFSET
4,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 4..10000
FORMULA
a(n) ~ A023003(n). - Vaclav Kotesovec, Feb 20 2021
MAPLE
b:= proc(n, k) option remember; `if`(k<2, `if`(n=0, 1-k, combinat[
numbpart](n)), (q-> add(b(j, q)*b(n-j, k-q), j=0..n))(iquo(k, 2)))
end:
a:= n-> b(n, 4):
seq(a(n), n=4..35); # Alois P. Heinz, Feb 07 2021
MATHEMATICA
nmax = 35; CoefficientList[Series[(-1 + Product[1/(1 - x^k), {k, 1, nmax}])^4, {x, 0, nmax}], x] // Drop[#, 4] &
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Feb 07 2021
STATUS
approved