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 A096691 #13 May 22 2017 11:50:34
%S A096691 0,1,2,5,8,10,13,17,20,22,23,25,31,32,37,38,40,41,43,46,47,55,61,70,
%T A096691 80,82,85,88,91,100,101,106,107,110,112,116,118,125,131,148,151,152,
%U A096691 155,160,161,163,166,172,173,176,196,200,202,211,212,223,226,227,245,247
%N A096691 Numbers n such that 8n^2 + 6n + 3 is prime.
%F A096691 a(n) = A096689(n)/2.
%t A096691 f[n_]:=n^2+(n+1)^2+(n+2); lst={};Do[p=f[n];If[PrimeQ[p],AppendTo[lst,n/2]],{n,0,6!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jul 04 2009 *)
%t A096691 Select[Range[0,300],PrimeQ[8#^2+6#+3]&] (* _Harvey P. Dale_, Jun 11 2015 *)
%o A096691 (PARI) is(n)=isprime(8*n^2+6*n+3) \\ _Charles R Greathouse IV_, May 22 2017
%Y A096691 Cf. A095697, A096689, A096690.
%K A096691 nonn
%O A096691 1,3
%A A096691 _Ray Chandler_, Jul 12 2004