A382896 Smith sphenic numbers, i.e., Smith numbers (A006753) that are the product of three distinct prime numbers.

438, 483, 627, 645, 654, 663, 762, 861, 915, 1086, 1581, 1626, 1842, 2067, 2265, 2373, 2409, 2679, 2751, 3138, 3246, 3345, 3615, 4173, 4191, 4209, 4974, 5253, 5298, 5397, 5946, 6054, 6315, 6531, 6567, 6585, 6603, 6693, 6702, 6855, 6981, 7026, 7089, 7287

Offset: 1

Author

Shyam Sunder Gupta, Apr 08 2025

Keywords

• nonn
• base

Examples

			438 is a term since 438 = 2 * 3 * 73, so it is the product of three distinct prime numbers (2, 3, and 73) and also a Smith number (4 + 3 + 8 = 2 + 3 + 7 + 3).
		

Links

• Shyam Sunder Gupta, Table of n, a(n) for n = 1..7523
• Shyam Sunder Gupta, Smith Numbers, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 4, 127-157.

Crossrefs

Intersection of A006753 and A007304.