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A309953 Product of digits of (n written in base 3). 4
0, 1, 2, 0, 1, 2, 0, 2, 4, 0, 0, 0, 0, 1, 2, 0, 2, 4, 0, 0, 0, 0, 2, 4, 0, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 2, 4, 0, 0, 0, 0, 2, 4, 0, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 0, 4, 8, 0, 0, 0, 0, 4, 8, 0, 8, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
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) * (1 + A(x^3)).

MATHEMATICA

Table[Times @@ IntegerDigits[n, 3], {n, 0, 100}]

PROG

(PARI) a(n) = {if(n, vecprod(digits(n, 3)), 0)} \\ Andrew Howroyd, Aug 24 2019

(MAGMA) [0] cat [&*Intseq(n, 3):n in [1..100]]; // Marius A. Burtea, Aug 25 2019

CROSSREFS

Cf. A007089, A007954, A053735.

Sequence in context: A125921 A321457 A029299 * A281666 A049803 A331843

Adjacent sequences:  A309950 A309951 A309952 * A309954 A309955 A309956

KEYWORD

nonn,base,look

AUTHOR

Ilya Gutkovskiy, Aug 24 2019

STATUS

approved

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Last modified July 28 16:54 EDT 2021. Contains 346335 sequences. (Running on oeis4.)