This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A338074 #8 Oct 21 2020 17:52:25 %S A338074 3,6,10,14,18,22,23,26,46,51,54,58,87,99,106,107,110,114,134,135,142, %T A338074 155,171,182,195,199,210,214,215,255,259,271,274,295,299,315,323,326, %U A338074 347,367,371,390,391,394,398,443,451,471,475,478,491,495,511,523,531,543,547,567,575,579,599 %N A338074 Numbers k such that A336957(k) is twice a prime. %C A338074 See the comment in A336957 discussing when primes first appear in A336957. %H A338074 N. J. A. Sloane, <a href="/A338074/b338074.txt">Table of n, a(n) for n = 1..20000</a> %H A338074 N. J. A. Sloane, <a href="/A337275/a337275.txt">Table comparing the present sequence and A337275</a> %Y A338074 Cf. A336957, A337275. %K A338074 nonn %O A338074 1,1 %A A338074 _N. J. A. Sloane_, Oct 21 2020