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 A106876 #18 Aug 05 2014 14:16:29 %S A106876 3,11,43,67,83,131,139,179,227,283,307,331,379,443,467,491,523,547, %T A106876 563,643,683,691,739,787,811,827,859,971,1019,1091,1123,1163,1187, %U A106876 1291,1307,1427,1451,1523,1531,1571,1619,1667,1699,1723,1787,1811 %N A106876 Primes of the form 3x^2-2xy+3y^2, with x and y nonnegative. %C A106876 Discriminant=-32. %H A106876 Vincenzo Librandi and Ray Chandler, <a href="/A106876/b106876.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106876 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 A106876 QuadPrimes2[3, -2, 3, 10000] (* see A106856 *) %Y A106876 Cf. A243177, A007520. %K A106876 nonn,easy %O A106876 1,1 %A A106876 _T. D. Noe_, May 09 2005