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 A106883 #17 Aug 05 2014 14:16:29 %S A106883 3,61,79,127,199,283,313,433,571,601,727,757,829,883,919,937,1069, %T A106883 1093,1213,1291,1297,1531,1609,1663,1699,1741,1777,2053,2083,2089, %U A106883 2161,2239,2341,2383,2677,2707,2713,2731,2887,3019,3169,3301,3319 %N A106883 Primes of the form 3x^2+3xy+4y^2, with x and y nonnegative. %C A106883 Discriminant=-39. %H A106883 Vincenzo Librandi and Ray Chandler, <a href="/A106883/b106883.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A106883 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 A106883 QuadPrimes2[3, 3, 4, 10000] (* see A106856 *) %K A106883 nonn,easy %O A106883 1,1 %A A106883 _T. D. Noe_, May 09 2005