A102193 Iccanobirt semiprimes (3 of 15): Semiprime numbers in A102113.

4, 62, 203, 12622, 1587497, 1868619823, 90661877021812382699758, 1538984096138042194598749, 176790247727720247287001192437, 2726402749746956241622994522641, 186786483736027016457092821075933, 273198997240107723863576578753631, 32049985148080783062944679479294696996434

Offset: 1

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

• nonn
• less
• base

Crossrefs

Cf. A001358, A102113, A102191-A102205.

Formula

a(n) = A102113(A102173(n)).

Extensions

Offset changed to 1 and more terms from Jinyuan Wang, Aug 10 2021