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 A336944 Numbers k that have at least two different representations as the product of a number and of its decimal digits. 6
 0, 192, 648, 819, 1197, 1536, 4872, 4977, 5976, 7056, 9968, 13608, 20448, 21168, 22176, 22428, 22752, 32040, 33984, 35424, 36864, 37692, 38736, 59778, 64152, 77600, 89928, 96912, 112833, 112896, 113148, 116352, 116736, 120384, 120708, 146412, 154752, 156288, 192888 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Subsequence of A336826. LINKS Chai Wah Wu, Table of n, a(n) for n = 1..10000 (n = 1..500 from Seiichi Manyama) EXAMPLE 192 = 24 * (2*4) = 32 * (3*2). 549504 = 1696 * (1*6*9*6) = 2862 * (2*8*6*2) = 3392 * (3*3*9*2) = 3816 * (3*8*1*6). 1798848 = 6246 * (6*2*4*6) = 12492 * (1*2*4*9*2) = 33312 * (3*3*3*1*2). MATHEMATICA digprod[n_] := n * Times @@ IntegerDigits[n]; seqQ[0] = True; seqQ[n_] := DivisorSum[n, Boole[digprod[#] == n] &] > 1; Select[Range[0, 2 * 10^5], seqQ] (* Amiram Eldar, Aug 08 2020 *) CROSSREFS Cf. A098736, A336826, A336876. Sequence in context: A254854 A254847 A251083 * A194647 A054001 A051527 Adjacent sequences: A336941 A336942 A336943 * A336945 A336946 A336947 KEYWORD nonn,base AUTHOR Seiichi Manyama, Aug 08 2020 STATUS approved

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Last modified August 12 03:53 EDT 2024. Contains 375085 sequences. (Running on oeis4.)