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 A139969 #16 Sep 08 2022 08:45:34
%S A139969 43,109,211,277,373,541,547,571,613,739,877,1051,1117,1381,1429,1579,
%T A139969 1597,1723,1789,1933,2053,2221,2251,2389,2437,2683,2851,3109,3187,
%U A139969 3229,3571,3637,3691,3739,3907,4099,4243,4363,4813,4957,5077,5419
%N A139969 Primes of the form 21x^2+22y^2.
%C A139969 Discriminant=-1848. See A139827 for more information.
%H A139969 Vincenzo Librandi and Ray Chandler, <a href="/A139969/b139969.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A139969 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)
%F A139969 The primes are congruent to {43, 85, 109, 205, 211, 277, 373, 403, 541, 547, 571, 589, 613, 667, 739, 835, 877, 1003, 1051, 1075, 1117, 1261, 1339, 1381, 1429, 1579, 1597, 1723, 1789, 1843} (mod 1848).
%t A139969 QuadPrimes2[21, 0, 22, 10000] (* see A106856 *)
%o A139969 (Magma) [ p: p in PrimesUpTo(6000) | p mod 1848 in [43, 85, 109, 205, 211, 277, 373, 403, 541, 547, 571, 589, 613, 667, 739, 835, 877, 1003, 1051, 1075, 1117, 1261, 1339, 1381, 1429, 1579, 1597, 1723, 1789, 1843]]; // _Vincenzo Librandi_, Aug 02 2012
%K A139969 nonn,easy
%O A139969 1,1
%A A139969 _T. D. Noe_, May 02 2008