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 A103776 #16 Sep 08 2022 08:45:17 %S A103776 2,7,11,17,41,61,101,167,227,257,281,337,347,367,397,401,461,467,487, %T A103776 541,571,587,601,631,641,647,661,691,701,761,857,947,971,977,997,1021, %U A103776 1087,1237,1277,1291,1381,1451,1481,1607,1621,1627,1667,1697,1787,1811 %N A103776 Primes p such that 8*p^2 + 4*p + 1 is also prime. %H A103776 Vincenzo Librandi, <a href="/A103776/b103776.txt">Table of n, a(n) for n = 1..1000</a> %t A103776 Select[Prime[Range[300]], PrimeQ[8 #^2 + 4 # + 1]&] (* _Harvey P. Dale_, Jan 04 2011 *) %o A103776 (Magma) [n: n in [0..2000] | IsPrime(n) and IsPrime(8*n^2 + 4*n + 1)]; // _Vincenzo Librandi_, Feb 03 2014 %Y A103776 Cf. A102083. %K A103776 nonn,easy %O A103776 1,1 %A A103776 _Zak Seidov_, Feb 15 2005