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%I #2 Mar 30 2012 17:26:20
%S 23,29,71,17,59,37,71,41,67,71,43,109,59,67,173,83,89,151,103,89,127,
%T 101,131,113,127,109,131,113,127,193,157,157,181,179,229,163,193,191,
%U 211,223,223,239,241,211,211,211,271,281,241,241,263,307,307,373,293
%N Smallest prime p such that p-/+2n are semiprimes.
%C Cf. A063643 Primes p such that p+/-2 are semiprimes, A117328 Primes p such that p+/-4 are semiprimes.
%e a(100)=571 because 571-2*100=371=7*53 (semiprime), 571+2*100=771=3*257 (semiprime).
%Y Cf. A063643.
%K nonn
%O 1,1
%A _Zak Seidov_, Mar 08 2006
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