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 A106923 #17 Aug 05 2014 14:16:29 %S A106923 43,109,151,331,337,499,751,757,907,919,1117,1201,1303,1471,1549,1789, %T A106923 2053,2137,2143,2221,2311,2473,2647,2713,3049,3259,3301,3361,3607, %U A106923 3697,3943,4099,4363,4447,4621,4783,4789,5209,5527,5623,5653,5737 %N A106923 Primes of the form 4x^2+xy+4y^2, with x and y nonnegative. %C A106923 Discriminant=-63. %H A106923 Vincenzo Librandi and Ray Chandler, <a href="/A106923/b106923.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106923 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 A106923 QuadPrimes2[4, 1, 4, 10000] (* see A106856 *) %K A106923 nonn,easy %O A106923 1,1 %A A106923 _T. D. Noe_, May 09 2005