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A057662 Smallest prime q(n) such that q(n)+2^p(n) is a prime, where p(n) is the n-th prime. 2

%I

%S 3,3,5,3,5,17,29,53,11,11,11,29,71,29,5,5,131,197,3,11,29,23,89,29,

%T 359,149,239,239,881,281,29,3449,197,683,389,683,101,1283,83,191,1181,

%U 197,5,71,107,101,71,4001,1433,251,431,29,1361,89,509,83,2459,941,101,197

%N Smallest prime q(n) such that q(n)+2^p(n) is a prime, where p(n) is the n-th prime.

%C n=6, p(6)=13, 8192+17=8209 is a prime but 8192+2,8182+3,...,8192+13 are not, so a(6)=17

%F a(n)=A056206[A000040(n)]

%Y A056206, A056208.

%K nonn

%O 0,1

%A _Labos Elemer_, Oct 16 2000

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Last modified September 24 12:38 EDT 2021. Contains 347642 sequences. (Running on oeis4.)