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 A106864 #26 Aug 05 2014 14:16:29
%S A106864 2,3,7,43,47,83,103,107,163,167,223,263,283,347,367,383,443,467,487,
%T A106864 503,523,547,607,643,683,743,787,823,827,863,883,887,947,967,983,1063,
%U A106864 1087,1123,1223,1303,1307,1367,1423,1427,1447,1483,1487,1523,1583
%N A106864 Primes of the form 2x^2+2xy+3y^2 with x and y nonnegative.
%C A106864 See A106865 for all primes represented by this form.
%C A106864 Discriminant=-20.
%C A106864 Union of {2} and primes == 3 or 7 mod 20. - _N. J. A. Sloane_, Sep 04 2012
%D A106864 David A. Cox, Primes of the Form x^2 + n y^2, Wiley, 1989. See Eq. (2.22), p. 33. - _N. J. A. Sloane_, Sep 04 2012
%H A106864 Vincenzo Librandi and Ray Chandler, <a href="/A106864/b106864.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A106864 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 A106864 QuadPrimes2[2, 2, 3, 10000] (* see A106856 *)
%Y A106864 Cf. A106865.
%K A106864 nonn,easy
%O A106864 1,1
%A A106864 _T. D. Noe_, May 09 2005