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 A064964 #2 Mar 30 2012 17:30:36 %S A064964 283,1864,3145,3772,4153,11902,18829,27736,28129,33739,36469,40207, %T A064964 47533,55996,60871,63184,63244,80839,91174,92683,93379,103672,107236, %U A064964 117337,117589,136765,143110,146590,161986,183889,189118,206419,207055 %N A064964 100000n+1, 100000n+3, 100000n+7, 100000n+9 are all primes. %t A064964 Select[Range[10^6/4], PrimeQ[10^5# + 1] && PrimeQ[10^5# + 3] && PrimeQ[10^5# + 7] && PrimeQ[10^5# + 9] &] %Y A064964 Cf. A007811 and A064687. %K A064964 nonn %O A064964 1,1 %A A064964 _Robert G. Wilson v_, Oct 29 2001