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 A106877 #18 Aug 05 2014 14:16:29 %S A106877 3,7,17,83,97,157,173,223,257,307,313,397,523,587,607,643,647,733,773, %T A106877 787,887,937,983,1013,1223,1277,1307,1427,1483,1487,1613,1637,1693, %U A106877 1753,1777,1783,1907,2203,2267,2273,2357,2383,2393,2593,2663,2677 %N A106877 Primes of the form 3x^2+xy+3y^2, with x and y nonnegative. %C A106877 Discriminant=-35. %H A106877 Vincenzo Librandi and Ray Chandler, <a href="/A106877/b106877.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106877 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 A106877 QuadPrimes2[3, 1, 3, 10000] (* see A106856 *) %Y A106877 Cf. A106878. %K A106877 nonn,easy %O A106877 1,1 %A A106877 _T. D. Noe_, May 09 2005