A250295 Numbers n such that A005165(n) is a semiprime.

9, 11, 12, 17, 18, 23, 26, 31, 62, 64, 67, 76, 78, 84, 87, 88, 123, 125, 131

Offset: 1

Author

Eric Chen, Dec 24 2014

Keywords

• nonn
• more

Comments

a(20) >= 150. - Max Alekseyev, Aug 26 2021

Examples

			a(1) = 9 so A005165(9) = 326981 = 79 * 4139 is a semiprime.
		

Links

• Hisanori Mishima, Factorizations of many number sequences
• Hisanori Mishima, Factorizations of many number sequences

Crossrefs

Cf. A001272, A005165.

Extensions

a(18)-a(19) from Max Alekseyev, Aug 26 2021