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 A106871 #18 Aug 05 2014 14:16:29 %S A106871 2,7,41,59,101,107,109,233,257,281,307,311,397,419,421,503,599,659, %T A106871 691,733,751,907,1051,1061,1087,1103,1163,1217,1249,1279,1291,1307, %U A106871 1321,1361,1373,1433,1471,1489,1597,1621,1693,1733,1777,1787,1831 %N A106871 Primes of the form 2x^2+xy+4y^2, with x and y nonnegative. %C A106871 Discriminant=-31. %H A106871 Vincenzo Librandi and Ray Chandler, <a href="/A106871/b106871.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106871 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 A106871 QuadPrimes2[2, 1, 4, 10000] (* see A106856 *) %Y A106871 Cf. A123064, A106872. %K A106871 nonn,easy %O A106871 1,1 %A A106871 _T. D. Noe_, May 09 2005