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%I #17 Feb 27 2024 03:03:16
%S 1,2,4,8,11,12,22,25,34,37,46,47,50,58,63,67,68,73,75,85,95,101,106,
%T 110,111,114,121,125,129,141,145,151,159,163,168,169,180,193,203,207,
%U 211,222,226,232,242,254,258,260,274,285
%N Numbers k such that 2*prime(k)-1 is prime.
%H Carl R. White, <a href="/A137288/b137288.txt">Table of n, a(n) for n = 1..10000</a>
%e k=11: 2*prime(11) - 1 = 2*31 - 1 = 61 is prime, so k=11 belongs to the sequence.
%Y Cf. A000040, A005382 (corresponding primes).
%K easy,nonn
%O 1,2
%A _Ctibor O. Zizka_, Apr 05 2008
%E More terms from _Paolo P. Lava_, Apr 15 2008
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