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 A227230 #22 Sep 08 2024 09:26:00
%S A227230 1,2,3,5,6,19,22
%N A227230 Numbers k such that 3*2^k + {5,7} are twin primes.
%C A227230 No more terms up to 10^4.
%C A227230 Any subsequent terms exceed 200,000. - _Lucas A. Brown_, Sep 02 2024
%C A227230 Any subsequent terms exceed 10^6, by non-primality of 3*2^k+7 for members of b-file at A057913 > 22 and table in Section 6 of Grantham and Granville link. - _Michael S. Branicky_, Sep 07 2024
%H A227230 Jon Grantham and Andrew Granville, <a href="https://arxiv.org/abs/2307.07894">Fibonacci primes, primes of the form 2^n-k and beyond</a>, arXiv:2307.07894 [math.NT], 2023.
%t A227230 Reap[Do[If[PrimeQ[a=3*2^n+5]&&PrimeQ[a+2],Sow[n]],{n,150}]][[2,1]]
%o A227230 (PARI) for(k = 1,10^4, if(ispseudoprime(a = 3*2^k + 5)&&ispseudoprime (a + 2), print1(k",")))
%Y A227230 Intersection of A057913 and A059746. - _Jason Yuen_, Sep 02 2024
%Y A227230 Cf. A071558, A181490.
%K A227230 nonn,more,hard
%O A227230 1,2
%A A227230 _Zak Seidov_, Sep 20 2013