OFFSET
0,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..50
PROG
(PARI) \\ here b(n) is A000522(n).
b(n)={sum(k=0, n, binomial(n, k)*k!)}
a(n)={(b(5*n) + 10*b(3*n) + 20*b(2*n) + 45*b(n) + 44) / 120} \\ Andrew Howroyd, Jan 27 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladeta Jovovic, Aug 22 2003
EXTENSIONS
Terms a(8) and beyond from Andrew Howroyd, Jan 27 2020
STATUS
approved