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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.

%I A162278 #7 Mar 11 2014 01:32:34
%S A162278 1,2,3,5,11,23,47,281,563,2251,22511,225109,450217,2701301,10805203,
%T A162278 43220813,2333923901,18671391209,560141736269,5601417362689,
%U A162278 22405669450757,448113389015141,3584907112121129,186415169830298707
%N 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.
%Y A162278 A061092, A072532
%K A162278 nonn
%O A162278 0,2
%A A162278 _Leroy Quet_, Jun 29 2009
%E A162278 Extended by _R. J. Mathar_, Jul 04 2009