A102171 Iccanobirt semiprime indices (1 of 15): Indices of semiprime numbers in A102111.

5, 11, 24, 33, 57, 64, 71, 72, 116, 126, 141, 174, 210, 311, 334, 370, 441, 480, 574

Offset: 1

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

• nonn
• more
• less
• base

Crossrefs

Cf. A001358, A102111, A102172-A102185.

Formula

A102111(a(n)) = A102191(n).

Extensions

a(13) from Robert Price, Nov 07 2018

Offset changed to 1 and a(14)-a(19) from Jinyuan Wang, Jul 31 2021