OFFSET
0,3
PROG
(PARI) {a(n) = sum(i=n, 4*n, (-1)^i*i!*polcoef(sum(j=1, 4, x^j/j!)^n, i))/n!}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, May 23 2019
STATUS
approved