A162278 a(0)=1. For n >= 1, a(n) = the smallest prime either of the form a(n-1)*k - 1 or of the form a(n-1)*k + 1, for some k >= 2.

1, 2, 3, 5, 11, 23, 47, 281, 563, 2251, 22511, 225109, 450217, 2701301, 10805203, 43220813, 2333923901, 18671391209, 560141736269, 5601417362689, 22405669450757, 448113389015141, 3584907112121129, 186415169830298707

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Crossrefs

A061092, A072532

Sequence in context: A073434 A109551 A326393 * A173927 A027763 A233694

Adjacent sequences: A162275 A162276 A162277 * A162279 A162280 A162281

Keyword

nonn

Author

Leroy Quet, Jun 29 2009

Extensions

Extended by R. J. Mathar, Jul 04 2009

Status

approved