OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
G.f. A(x) satisfies: A(x) = x * (1 + 2*x + 3*x^2 + 4*x^3) * (1 + A(x^5)).
MATHEMATICA
Table[Times @@ IntegerDigits[n, 5], {n, 0, 100}]
PROG
(PARI) a(n) = my(d = if (n, digits(n, 5), [0])); vecprod(d); \\ Michel Marcus, Aug 25 2019
(Magma) [0] cat [&*Intseq(n, 5):n in [1..100]]; // Marius A. Burtea, Aug 25 2019
CROSSREFS
KEYWORD
AUTHOR
Ilya Gutkovskiy, Aug 24 2019
STATUS
approved