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 A341433 Numbers that are divisible by the product of their digits in primorial base representation. 1
 1, 3, 9, 21, 39, 51, 99, 249, 261, 309, 669, 729, 2559, 2571, 2619, 2979, 3051, 4239, 7179, 7191, 32589, 32601, 32649, 32661, 33009, 33021, 37209, 37269, 37629, 51489, 92649, 92709, 93069, 97281, 272889, 274509, 543099, 543111, 543159, 543519, 543591, 544779 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The primorial base repunits (A143293) are all terms since their product of digits in primorial base is 1. All the terms are zeroless in primorial base, and therefore they are terms of A328574. In particular, since the last digit of even numbers in primorial base is 0, all the terms are odd numbers. LINKS Amiram Eldar, Table of n, a(n) for n = 1..150 Wikipedia, Primorial number system. EXAMPLE 9 is a term since 9 in primorial base is 111 (9 = 3! + 2! + 1!) and 9 is divisible by 1*1*1 = 1. MATHEMATICA max = 12; bases = Prime@Range[max, 1, -1]; nmax = Times @@ bases - 1; q[n_] := FreeQ[(d = IntegerDigits[n, MixedRadix[bases]]), 0] && Divisible[n, Times @@ d]; Select[Range[1, 10^5, 2], q] CROSSREFS A143293 is a subsequence. Subsequence of A328574. Cf. A007602, A049345, A235168, A286590, A333426. Sequence in context: A048780 A009864 A128127 * A014857 A177817 A292392 Adjacent sequences: A341430 A341431 A341432 * A341434 A341435 A341436 KEYWORD nonn,base AUTHOR Amiram Eldar, Feb 11 2021 STATUS approved

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Last modified January 27 02:41 EST 2023. Contains 359836 sequences. (Running on oeis4.)