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%I #2 Mar 31 2012 20:08:02
%S 7,13,19,29,43,53,61,107,113,181,193,229,251,317,337,383,433,463,491,
%T 601,827,857,887,997,1033,1061,1163,1193,1307,1373,1531,1693,1699,
%U 1721,1789,1811,1831,1931,2003,2029,2267,2339,2347
%N Primes p such that p+1=C(q)=q-th composite and q is prime.
%C In general P(k)=k-th prime=k+n where n is the index of the composite P(k)+1 (k>=2)
%e a(5)=43 because 43+1=44=C(29) and 29 is prime.
%Y Cf. A100718.
%K nonn
%O 1,1
%A _Robin Garcia_, Dec 24 2004
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