OFFSET
0,13
COMMENTS
a(n) is the number of set partitions of [n] into blocks of size > 5.
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..595
FORMULA
E.g.f.: Product_{i>5} exp(x^i/i!).
MAPLE
a:= proc(n) option remember; `if`(n=0, 1, add(
a(n-j)*binomial(n-1, j-1), j=6..n))
end:
seq(a(n), n=0..35); # Alois P. Heinz, Sep 28 2017
MATHEMATICA
m = 31;
Exp[Exp[x] - Sum[x^i/i!, {i, 0, 5}]] + O[x]^m // CoefficientList[#, x]& // (# Range[0, m-1]!)& (* Jean-François Alcover, Mar 08 2021 *)
PROG
(PARI) my(x='x+O('x^66)); Vec(serlaplace(exp(exp(x)-1-x-x^2/2-x^3/6-x^4/24-x^5/120)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 28 2017
STATUS
approved