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 A033230 #22 Jul 08 2025 19:46:20 %S A033230 43,47,59,79,107,173,181,197,239,293,367,397,443,461,487,613,619,643, %T A033230 701,719,769,787,797,809,827,857,977,1013,1049,1063,1091,1129,1171, %U A033230 1217,1399,1487,1543,1549,1559,1597 %N A033230 Primes of form x^2+43*y^2. %D A033230 David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989. %H A033230 Vincenzo Librandi and Ray Chandler, <a href="/A033230/b033230.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A033230 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 A033230 QuadPrimes2[1, 0, 43, 10000] (* see A106856 *) %K A033230 nonn,easy %O A033230 1,1 %A A033230 _N. J. A. Sloane_