A309954 Product of digits of (n written in base 4).

0, 1, 2, 3, 0, 1, 2, 3, 0, 2, 4, 6, 0, 3, 6, 9, 0, 0, 0, 0, 0, 1, 2, 3, 0, 2, 4, 6, 0, 3, 6, 9, 0, 0, 0, 0, 0, 2, 4, 6, 0, 4, 8, 12, 0, 6, 12, 18, 0, 0, 0, 0, 0, 3, 6, 9, 0, 6, 12, 18, 0, 9, 18, 27, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 2, 4, 6, 0, 3, 6, 9, 0, 0, 0, 0, 0

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) * (1 + A(x^4)).

Mathematica

Table[Times @@ IntegerDigits[n, 4], {n, 0, 100}]

Crossrefs

Cf. A007090, A007954, A053737.

Sequence in context: A049804 A277904 A132387 * A124757 A242305 A049263

Adjacent sequences: A309951 A309952 A309953 * A309955 A309956 A309957

Keyword

nonn,base

Author

Ilya Gutkovskiy, Aug 24 2019

Status

approved