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 A106873 #18 Aug 05 2014 14:16:29 %S A106873 2,5,19,71,97,103,113,157,163,191,193,211,317,359,373,439,443,467,479, %T A106873 541,547,563,593,661,683,701,727,769,877,887,977,997,1033,1039,1093, %U A106873 1123,1151,1223,1229,1289,1399,1409,1423,1427,1459,1601,1609,1613 %N A106873 Primes of the form 2x^2-xy+4y^2, with x and y nonnegative. %C A106873 Discriminant=-31. %H A106873 Vincenzo Librandi and Ray Chandler, <a href="/A106873/b106873.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106873 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 A106873 QuadPrimes2[2, -1, 4, 10000] (* see A106856 *) %Y A106873 Cf. A123064, A106872. %K A106873 nonn,easy %O A106873 1,1 %A A106873 _T. D. Noe_, May 09 2005