OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..450
FORMULA
E.g.f.: (1+(x+1)*sinh(x))/(1-x).
Lim_{n->infinity} a(n)/n! = 1+2*sinh(1) = 1+e-1/e = 1+A174548. - Amrit Awasthi, May 19 2021
MAPLE
a:= proc(n) a(n):= n*a(n-1) + n^(1+n mod 2) end: a(0):= 1:
seq(a(n), n=0..23);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 14 2021
STATUS
approved