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 A139498 #4 Jun 19 2014 15:19:39
%S A139498 19,61,139,199,229,271,349,499,541,571,619,631,691,709,739,769,859,
%T A139498 919,1051,1069,1201,1279,1429,1489,1531,1621,1669,1759,1831,1879,1999,
%U A139498 2011,2221,2239,2251,2281,2341,2551,2671,2791,2851,2971,3019,3049,3079,3121
%N A139498 Primes of the form x^2 + 17x*y + y^2 for x and y nonnegative.
%H A139498 N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)
%t A139498 a = {}; w = 17; k = 1; Do[Do[If[PrimeQ[n^2 + w*n*m + k*m^2], AppendTo[a, n^2 + w*n*m + k*m^2]], {n, m, 400}], {m, 1, 400}]; Union[a] (*Artur Jasinski*)
%Y A139498 Cf. A139489, A007645, A068228, A007519, A033212, A033212, A107152, A107008, A033215, A107145, A139490, A139491.
%K A139498 nonn
%O A139498 1,1
%A A139498 _Artur Jasinski_, Apr 24 2008