A136012 Numbers n in any run of two or more numbers each having exactly two distinct prime divisors.

14, 15, 20, 21, 22, 33, 34, 35, 36, 38, 39, 40, 44, 45, 46, 50, 51, 52, 54, 55, 56, 57, 58, 62, 63, 68, 69, 74, 75, 76, 77, 85, 86, 87, 88, 91, 92, 93, 94, 95, 96, 98, 99, 100, 111, 112, 115, 116, 117, 118, 119, 122, 123, 124, 133, 134, 135, 136, 141, 142, 143, 144

Offset: 1

Author

Enoch Haga, Dec 09 2007

Keywords

• easy
• nonn

Examples

			a(3) to a(5), 20 to 22, are a run of 3 consecutive numbers each having exactly 2 distinct prime divisors.
		

Crossrefs

Cf. A001221, A064709.

Extensions

Corrected and edited by R. J. Mathar, Dec 12 2007