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 A140028 #17 Sep 08 2022 08:45:34
%S A140028 43,127,547,823,883,907,1303,1327,1663,2083,3067,3823,3847,3943,4027,
%T A140028 4447,4603,4663,4783,5443,5503,6007,6343,6367,6763,6967,7687,7723,
%U A140028 8467,8527,8563,8863,9283,9403,9643,9907,10243,10663,10903,11047
%N A140028 Primes of the form 42x^2+42xy+43y^2.
%C A140028 Discriminant=-5460. See A139827 for more information.
%H A140028 Vincenzo Librandi and Ray Chandler, <a href="/A140028/b140028.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A140028 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 A140028 The primes are congruent to {43, 127, 547, 667, 823, 883, 907, 1303, 1327, 1387, 1507, 1663, 1843, 1927, 2083, 2167, 2227, 2263, 3007, 3067, 3103, 3403, 3487, 3823, 3847, 3943, 4027, 4183, 4267, 4447, 4603, 4663, 4783, 5203, 5287, 5443} (mod 5460).
%t A140028 QuadPrimes2[42, -42, 43, 10000] (* see A106856 *)
%o A140028 (Magma) [ p: p in PrimesUpTo(13000) | p mod 5460 in {43, 127, 547, 667, 823, 883, 907, 1303, 1327, 1387, 1507, 1663, 1843, 1927, 2083, 2167, 2227, 2263, 3007, 3067, 3103, 3403, 3487, 3823, 3847, 3943, 4027, 4183, 4267, 4447, 4603, 4663, 4783, 5203, 5287, 5443} ]; // _Vincenzo Librandi_, Aug 06 2012
%K A140028 nonn,easy
%O A140028 1,1
%A A140028 _T. D. Noe_, May 02 2008