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 A237814 #10 Sep 08 2022 08:46:06 %S A237814 2,5,11,41,89,131,191,251,419,431,641,809,1031,1229,1409,1439,1511, %T A237814 1559,1601,1889,1901,1931,2069,2351,2399,2459,2699,2741,2819,2939, %U A237814 3359,3449,3491,3761,3779,3911,4409,4919,5081,5849,6131,6449,6491,6551,7079,7151 %N A237814 Primes p such that 2*p+1 and 2*p+19 are also prime. %H A237814 Vincenzo Librandi, <a href="/A237814/b237814.txt">Table of n, a(n) for n = 1..1000</a> %e A237814 11 is in the sequence because 11, 2*11+1 = 23 and 2*11+19 = 41 are all prime. %t A237814 Select[Prime[Range[8000]], PrimeQ[2 # + 1] && PrimeQ[2 # + 19] &] (* _Vincenzo Librandi_, Feb 15 2014 *) %o A237814 (PARI) s=[]; forprime(p=2, 10000, if(isprime(2*p+1) && isprime(2*p+19), s=concat(s, p))); s %o A237814 (Magma) [p: p in PrimesUpTo(8000) | IsPrime(2*p+1) and IsPrime(2*p+19)]; // _Vincenzo Librandi_, Feb 15 2014 %Y A237814 Cf. A126107, A237810, A237811, A237812, A237813. %K A237814 nonn %O A237814 1,1 %A A237814 _Colin Barker_, Feb 13 2014