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 A033247 #22 Jul 08 2025 19:48:19 %S A033247 73,89,109,137,173,269,293,317,373,397,461,557,653,661,673,733,757, %T A033247 821,853,857,1021,1097,1193,1217,1229,1249,1289,1381,1609,1697,1861, %U A033247 1889,1973,2081,2129,2141,2309 %N A033247 Primes of form x^2+73*y^2. %D A033247 David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989. %H A033247 Vincenzo Librandi and Ray Chandler, <a href="/A033247/b033247.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A033247 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 A033247 QuadPrimes2[1, 0, 73, 10000] (* see A106856 *) %K A033247 nonn,easy %O A033247 1,1 %A A033247 _N. J. A. Sloane_