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 A165944 #8 Sep 08 2022 08:45:48
%S A165944 11,19,41,71,419,599,929,1481,1979,2351,2969,3659,4691,13109,19181,
%T A165944 19739,25121,27059,30449,32579,53129,57839,66821,69959,86729,98909,
%U A165944 122849,125669,129959,140249,144779,176819,202949,219491,250499,254519
%N A165944 Primes of the form p^2 +3p + 1, where p is also a prime.
%C A165944 Primes of the form p +(p+1)^2 = A000040(k) + A110833(k).
%H A165944 Vincenzo Librandi, <a href="/A165944/b165944.txt">Table of n, a(n) for n = 1..1000</a>
%t A165944 Select[Table[p^2 + 3 p + 1, {p, Prime[Range[300]]}], PrimeQ] (* _Vincenzo Librandi_, Jun 13 2014 *)
%o A165944 (Magma) [a: p in PrimesInInterval(1, 1000) | IsPrime(a) where a is (p^2 + 3*p + 1)]; // _Vincenzo Librandi_, Jun 13 2014
%K A165944 nonn,easy
%O A165944 1,1
%A A165944 _Claudio Meller_, Oct 01 2009
%E A165944 Entries checked - _R. J. Mathar_, Oct 05 2009