cp's OEIS Frontend

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.

A145488 Numbers k such that 6k+13 is prime and 12k+13 is also prime.

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%I A145488 #9 Jan 23 2017 18:00:07
%S A145488 0,4,5,8,14,15,19,25,28,30,33,35,44,49,50,54,60,68,70,85,88,93,99,100,
%T A145488 103,120,123,133,140,144,145,149,154,168,170,173,175,179,184,190,198,
%U A145488 215,228,235,245,253,259,264,268,274,275,280,285,288,294
%N A145488 Numbers k such that 6k+13 is prime and 12k+13 is also prime.
%H A145488 Ivan Neretin, <a href="/A145488/b145488.txt">Table of n, a(n) for n = 1..10000</a>
%F A145488 a(n) = (A145474(n)-13)/12.
%p A145488 select(k -> isprime(6*k+13) and isprime(12*k+13), [$0..1000]); # _Robert Israel_, Jan 23 2017
%t A145488 aa = {}; k = 13; Do[If[PrimeQ[(k + Prime[n])/2], AppendTo[aa, (Prime[n] - k)/12]], {n, 1, 500}]; aa
%Y A145488 Cf. A063908-A063913, A092109, A145471-A145490.
%K A145488 nonn
%O A145488 1,2
%A A145488 _Artur Jasinski_, Oct 11 2008
%E A145488 Definition corrected by _Ivan Neretin_, Jan 23 2017