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 A139876 #16 Sep 08 2022 08:45:34
%S A139876 7,31,103,199,223,271,367,439,607,727,1039,1063,1231,1279,1399,1447,
%T A139876 1543,1567,1783,1879,1951,2239,2287,2383,2551,2719,2791,2887,3079,
%U A139876 3391,3463,3559,3583,3631,3727,3919,3967,4231,4423,4567,4591,4639
%N A139876 Primes of the form 7x^2+24y^2.
%C A139876 Discriminant=-672. See A139827 for more information.
%H A139876 Vincenzo Librandi and Ray Chandler, <a href="/A139876/b139876.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A139876 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 A139876 Except for 7, the primes are congruent to {31, 55, 103} (mod 168).
%t A139876 QuadPrimes2[7, 0, 24, 10000] (* see A106856 *)
%o A139876 (Magma) [7] cat [ p: p in PrimesUpTo(6000) | p mod 168 in {31, 55, 103}]; // _Vincenzo Librandi_, Jul 30 2012
%K A139876 nonn,easy
%O A139876 1,1
%A A139876 _T. D. Noe_, May 02 2008