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 A023220 #32 Sep 08 2022 08:44:47 %S A023220 3,7,13,19,31,37,43,61,73,103,127,163,211,223,229,241,283,307,331,337, %T A023220 349,373,397,409,421,439,457,499,541,631,661,673,691,727,733,757,769, %U A023220 787,829,853,883,919,997,1021,1063,1087,1123,1129,1213,1231,1447,1543,1549 %N A023220 Primes p such that 5*p + 8 is also prime. %C A023220 Except for the first term all others are congruent to 1 (mod 6) because 5*(6*n+5)+8 is divisible by 3. - _Zak Seidov_, Aug 23 2012 %H A023220 John Cerkan, <a href="/A023220/b023220.txt">Table of n, a(n) for n = 1..10000</a> %t A023220 Select[Prime[Range[250]],PrimeQ[5#+8]&] (* _Harvey P. Dale_, Apr 21 2020 *) %o A023220 (Magma) [n: n in [0..1000] | IsPrime(n) and IsPrime(5*n+8)]; // _Vincenzo Librandi_, Nov 20 2010 %Y A023220 Cf. A002476, A111225 (supersequence). %K A023220 nonn %O A023220 1,1 %A A023220 _David W. Wilson_