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 A106868 #18 Aug 05 2014 14:16:29 %S A106868 2,3,29,31,47,73,131,151,163,193,197,233,239,277,349,353,397,487,491, %T A106868 499,509,547,577,601,647,653,683,811,857,859,863,929,947,1013,1021, %U A106868 1039,1093,1283,1289,1291,1297,1301,1327,1361,1429,1499,1511,1531 %N A106868 Primes of the form 2x^2-xy+3y^2, with x and y nonnegative. %C A106868 Discriminant=-23. %H A106868 Vincenzo Librandi and Ray Chandler, <a href="/A106868/b106868.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106868 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 A106868 QuadPrimes2[2, -1, 3, 10000] (* see A106856 *) %Y A106868 Cf. A028929, A106867. %K A106868 nonn,easy %O A106868 1,1 %A A106868 _T. D. Noe_, May 09 2005