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%I #8 Oct 21 2020 17:52:25
%S 3,6,10,14,18,22,23,26,46,51,54,58,87,99,106,107,110,114,134,135,142,
%T 155,171,182,195,199,210,214,215,255,259,271,274,295,299,315,323,326,
%U 347,367,371,390,391,394,398,443,451,471,475,478,491,495,511,523,531,543,547,567,575,579,599
%N Numbers k such that A336957(k) is twice a prime.
%C See the comment in A336957 discussing when primes first appear in A336957.
%H N. J. A. Sloane, <a href="/A338074/b338074.txt">Table of n, a(n) for n = 1..20000</a>
%H N. J. A. Sloane, <a href="/A337275/a337275.txt">Table comparing the present sequence and A337275</a>
%Y Cf. A336957, A337275.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Oct 21 2020
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