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 A309954 Product of digits of (n written in base 4). 5
 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 (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 + 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

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Last modified July 25 03:53 EDT 2021. Contains 346283 sequences. (Running on oeis4.)