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a(1) = 2, a(2n) = smallest prime of the type r*a(2n-1) +1, a(2n+1) = smallest prime of the type s*a(2n) -1.
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%I #4 Dec 05 2013 19:56:19

%S 2,3,5,11,43,173,691,6911,69109,1658617,3317233,19903399,39806797,

%T 238840783,4299134093,25794804559,464306482061,8357516677099,

%U 100290200125187,2607545203254863,73011265691136163,292045062764544653

%N a(1) = 2, a(2n) = smallest prime of the type r*a(2n-1) +1, a(2n+1) = smallest prime of the type s*a(2n) -1.

%K nonn

%O 1,1

%A _Amarnath Murthy_, Jul 29 2003

%E More terms from _David Wasserman_, Mar 09 2005