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A274191 Numbers that are a product of distinct numbers in A022086. 3

%I #6 Mar 10 2023 13:32:51

%S 3,6,9,15,18,24,27,39,45,54,63,72,90,102,117,135,144,162,165,189,216,

%T 234,267,270,306,351,360,378,405,432,495,567,585,612,648,699,702,801,

%U 810,918,936,945,990,1053,1080,1131,1134,1296,1485,1512,1530,1602,1701

%N Numbers that are a product of distinct numbers in A022086.

%C See the Comment on distinct-product sequences in A160009.

%H Clark Kimberling, <a href="/A274191/b274191.txt">Table of n, a(n) for n = 1..1000</a>

%e 17 = 3*6; 405 = 3*9*15.

%t f[1] = 3; f[2] = 6; z = 33; f[n_] := f[n - 1] + f[n - 2]; f = Table[f[n], {n, 1, z}]; f

%t s = {1}; Do[s = Union[s, Select[s*f[[i]], # <= f[[z]] &]], {i, z}]; s1 = Rest[s]

%Y Cf. A022086, A160009, A274288.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Jun 17 2016

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)