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 A033256 #24 Jul 08 2025 19:49:30 %S A033256 103,151,283,349,373,397,487,571,709,787,877,883,1039,1459,1531,1567, %T A033256 1753,2017,2029,2179,2203,2239,2371,2383,2557,2617,2659,2719,2749, %U A033256 2791,2851,3181,3253,3301,3331,3373 %N A033256 Primes of form x^2+87*y^2. %C A033256 Also primes of the form x^2-xy+22y^2 with x and y nonnegative. - _T. D. Noe_, May 08 2005 %D A033256 David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989. %H A033256 Vincenzo Librandi and Ray Chandler, <a href="/A033256/b033256.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A033256 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 A033256 QuadPrimes2[1, 0, 87, 10000] (* see A106856 *) %K A033256 nonn,easy %O A033256 1,1 %A A033256 _N. J. A. Sloane_