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 A145487 #11 Jul 22 2025 06:13:33
%S A145487 0,1,2,3,4,7,8,9,11,14,16,21,22,24,29,32,37,38,42,43,46,51,58,63,64,
%T A145487 66,71,73,77,79,81,84,92,98,99,102,106,107,108,113,119,123,134,136,
%U A145487 142,143,156,157,158,162,184,191,196,198,203,212,217,219,227,228,238,241,246
%N A145487 Numbers k such that 6k+5 is prime and 12k+5 is also prime.
%H A145487 Ivan Neretin, <a href="/A145487/b145487.txt">Table of n, a(n) for n = 1..10000</a>
%F A145487 a(n) = (A145471(n)-5)/12.
%t A145487 aa = {}; k = 5; Do[If[PrimeQ[(k + Prime[n])/2], AppendTo[aa, (Prime[n] - 5)/12]], {n, 1, 500}]; aa
%t A145487 Select[Range[0, 250], PrimeQ[6 # + 5] && PrimeQ[12 # + 5] &] (* _Ivan Neretin_, Jan 21 2017 *)
%t A145487 Select[Range[0,250],AllTrue[5+{6#,12#},PrimeQ]&] (* _Harvey P. Dale_, Dec 20 2022 *)
%Y A145487 Cf. A063908-A063913, A092109, A145471-A145490.
%K A145487 nonn
%O A145487 1,3
%A A145487 _Artur Jasinski_, Oct 11 2008