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 A139992 #17 Sep 08 2022 08:45:34
%S A139992 47,167,383,503,647,887,983,1223,1487,1823,1847,2063,2663,2687,2903,
%T A139992 3023,3167,3407,3527,3863,4007,4583,4703,5087,5927,6047,6263,6863,
%U A139992 7103,7607,7703,7727,8447,8543,8783,9623,9743,9887,10223,10247,10463
%N A139992 Primes of the form 20x^2+20xy+47y^2.
%C A139992 Discriminant=-3360. See A139827 for more information.
%C A139992 Also primes of the forms 47x^2+40xy+80y^2 and 47x^2+42xy+63y^2. See A140633. - _T. D. Noe_, May 19 2008
%H A139992 Vincenzo Librandi and Ray Chandler, <a href="/A139992/b139992.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A139992 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 A139992 The primes are congruent to {47, 143, 167, 383, 503, 647} (mod 840).
%t A139992 QuadPrimes2[20, -20, 47, 10000] (* see A106856 *)
%o A139992 (Magma) [p: p in PrimesUpTo(12000) | p mod 840 in [47, 143, 167, 383, 503, 647]]; // _Vincenzo Librandi_, Aug 03 2012
%K A139992 nonn,easy
%O A139992 1,1
%A A139992 _T. D. Noe_, May 02 2008