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%I #9 Feb 09 2025 06:56:26
%S 2,3,10,51,4462,6883
%N Numbers k such that 2^prime(k) - 3 is prime.
%F Apply PrimePi to A283266.
%e Prime(3) = 5 and 2^5 - 3 = 29 is prime, so k = 3 is a member.
%o (PARI) isok(k) = ispseudoprime(1<<prime(k)-3); \\ _Jinyuan Wang_, Feb 09 2025
%Y Cf. A000720, A050414, A283266.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Feb 01 2025