A102191 Iccanobirt semiprimes (1 of 15): Semiprime numbers in A102111.

4, 185, 1135955, 550783729, 10755767351826313, 885150880428474601, 145045760838001005739, 276700469046311728441, 17906534239981723909956235510218343, 23104799226903739899579090259021365554, 504198286800075916303995704410366363448429, 2363732899718211729861685511671459865604449872085443

Offset: 1

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

• nonn
• less
• base

Crossrefs

Cf. A001358, A102111, A102192-A102205.

Formula

a(n) = A102111(A102171(n)).

Extensions

Offset changed to 1 and more terms from Jinyuan Wang, Jul 31 2021