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a(n+1) is the smallest odd prime not already used such that a(n)*a(n+1)+2 is prime.
2

%I #5 Dec 05 2013 19:56:49

%S 3,5,7,11,19,23,37,17,13,29,43,53,109,71,31,47,73,227,163,59,79,113,

%T 67,41,61,89,139,131,241,149,103,167,127,101,157,83,97,137,181,179,

%U 151,191,199,173,193,233,229,269,271,251,211,317,277,107,313,293,349,311

%N a(n+1) is the smallest odd prime not already used such that a(n)*a(n+1)+2 is prime.

%Y Cf. A093930.

%K easy,nonn

%O 1,1

%A _Amarnath Murthy_, Apr 25 2004

%E Edited and extended by _David Wasserman_, Jan 10 2006