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 A033246 #24 Jul 08 2025 19:48:13 %S A033246 71,107,293,509,643,647,739,971,1013,1039,1123,1217,1361,1367,1373, %T A033246 1423,1663,1811,2083,2099,2239,2309,2351,2557,2657,2677,2917,3181, %U A033246 3343,3517,3533,3539,3623,3671,3803 %N A033246 Primes of form x^2+71*y^2. %C A033246 Also primes of the form x^2-xy+18y^2 with x and y nonnegative. - _T. D. Noe_, May 08 2005 %D A033246 David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989. %H A033246 Vincenzo Librandi and Ray Chandler, <a href="/A033246/b033246.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A033246 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 A033246 QuadPrimes2[1, 0, 71, 10000] (* see A106856 *) %K A033246 nonn,easy %O A033246 1,1 %A A033246 _N. J. A. Sloane_