A274282 Numbers that are a product of distinct numbers in A000285.

1, 4, 5, 9, 14, 20, 23, 36, 37, 45, 56, 60, 70, 92, 97, 115, 126, 148, 157, 180, 185, 207, 240, 254, 280, 300, 322, 333, 388, 411, 460, 485, 504, 518, 540, 628, 630, 665, 740, 785, 828, 840, 851, 873, 1016, 1035, 1076, 1200, 1270, 1288, 1332, 1358, 1380

Offset: 1

Author

Clark Kimberling, Jun 17 2016

Keywords

• nonn
• easy

Comments

See the Comment on distinct-product sequences in A160009.

Examples

			20 = 4*5, 180 = 4*5*9.
		

Crossrefs

Cf. A000285, A160009, A274288.

Programs

Mathematica

f[1] = 1; f[2] = 4; z = 32; f[n_] := f[n - 1] + f[n - 2]; f = Table[f[n], {n, 1, z}]; f
s = {1}; Do[s = Union[s, Select[s*f[[i]], # <= f[[z]] &]], {i, z}]; s