A102185 Iccanobirt semiprime indices (15 of 15): Indices of semiprime numbers in A102125.

5, 15, 16, 19, 20, 21, 22, 24, 28, 29, 35, 38, 44, 54, 58, 59, 72, 84, 106, 108, 137, 145, 174, 227, 238, 253, 258, 362, 363, 371, 388

Offset: 1

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

• nonn
• base
• more
• less

Crossrefs

Cf. A001358, A102125, A102171-A102184, A102205.

Formula

A102125(a(n)) = A102205(n).

Extensions

a(24)-a(27) from Robert Price, Nov 11 2018

Offset changed to 1 and a(28)-a(31) from Jinyuan Wang, Aug 15 2021