A088076 Smallest prime sandwiched between two numbers having exactly n prime divisors.

3, 11, 131, 1429, 77141, 3847271, 117048931, 22917541219, 1771365487891, 140734085123059, 14159733947566481

Offset: 1

Author

Amarnath Murthy, Sep 22 2003

Keywords

• more
• nonn

Comments

Different from A088075 though initial three terms match. Sequence is infinite.

Examples

			a(3) = 131, 130 = 2*5*13 and 132 = 2^2*3*11 both have three prime divisors. 131 is the smallest such prime.
		

References

• J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 131, p. 45, Ellipses, Paris 2008.

Crossrefs

Cf. A088075.

Extensions

More terms from Ray Chandler, Oct 08 2003

a(8) and a(9) from Donovan Johnson, Jun 19 2008

a(10)-a(11) from Donovan Johnson, Feb 18 2009