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 A139830 #17 Sep 08 2022 08:45:33
%S A139830 7,23,47,103,127,167,223,263,367,383,463,487,503,607,647,727,743,823,
%T A139830 863,887,967,983,1063,1087,1103,1223,1303,1327,1367,1423,1447,1487,
%U A139830 1543,1567,1583,1607,1663,1783,1823,1847,2063,2087,2143,2207,2287
%N A139830 Primes of the form 7x^2+6xy+7y^2.
%C A139830 Discriminant=-160. See A139827 for more information.
%C A139830 Also primes of the forms 7x^2+2xy+23y^2 and 7x^2+4xy+12y^2. See A140633. - _T. D. Noe_, May 19 2008
%H A139830 Vincenzo Librandi and Ray Chandler, <a href="/A139830/b139830.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A139830 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 A139830 The primes are congruent to {7, 23} (mod 40).
%t A139830 Union[QuadPrimes2[7, 6, 7, 10000], QuadPrimes2[7, -6, 7, 10000]] (* see A106856 *)
%o A139830 (Magma) [ p: p in PrimesUpTo(3000) | p mod 40 in {7, 23}]; // _Vincenzo Librandi_, Jul 29 2012
%K A139830 nonn,easy
%O A139830 1,1
%A A139830 _T. D. Noe_, May 02 2008