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 + 5*x^4 + 6*x^5) * (1 + A(x^7)).
MATHEMATICA
Table[Times @@ IntegerDigits[n, 7], {n, 0, 100}]
PROG
(Magma) [0] cat [&*Intseq(n, 7):n in [1..100]]; // Marius A. Burtea, Aug 25 2019
(PARI) a(n) = my(v=vecprod(digits(n, 7))); n>0 && return(v) \\ Felix Fröhlich, Sep 09 2019
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Ilya Gutkovskiy, Aug 24 2019
STATUS
approved