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 A156300 #8 Sep 08 2022 08:45:41 %S A156300 2,3,7,13,19,43,61,67,79,97,109,127,151,163,181,211,223,229,277,307, %T A156300 331,373,379,397,457,463,523,601,607,613,673,727,733,751,757,853,883, %U A156300 907,919,967,1021,1033,1069,1117,1171,1201,1231,1237,1321,1327,1381,1399 %N A156300 Primes p such that 4*p - 5 is also prime. %H A156300 Vincenzo Librandi, <a href="/A156300/b156300.txt">Table of n, a(n) for n = 1..1000</a> %t A156300 Select[Prime[Range[1400]], PrimeQ[(4# - 5)]&] (* _Vincenzo Librandi_, Oct 31 2012 *) %o A156300 (Magma) [p: p in PrimesUpTo(1400) | IsPrime(4*p - 5)]; // _Vincenzo Librandi_, Oct 31 2012 %Y A156300 Cf. A156287, A156288. %K A156300 nonn,easy %O A156300 1,1 %A A156300 _Vincenzo Librandi_, Feb 07 2009