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 A139881 #19 Sep 08 2022 08:45:34
%S A139881 2,89,101,113,149,173,233,269,353,401,509,569,701,773,797,809,821,857,
%T A139881 881,929,941,977,1013,1061,1109,1193,1217,1277,1289,1409,1481,1493,
%U A139881 1601,1637,1721,1901,1949,1997,2213,2237,2273,2297,2309,2333,2357
%N A139881 Primes of the form 2x^2+2xy+89y^2.
%C A139881 Discriminant=-708. See A139827 for more information.
%H A139881 Vincenzo Librandi and Ray Chandler, <a href="/A139881/b139881.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
%H A139881 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 A139881 The primes are congruent to {2, 65, 77, 89, 101, 113, 149, 161, 173, 185, 209, 221, 233, 269, 305, 329, 353, 365, 377, 401, 437, 485, 509, 533, 545, 569, 581, 629, 689, 701} (mod 708).
%t A139881 QuadPrimes2[2, -2, 89, 10000] (* see A106856 *)
%o A139881 (Magma) [ p: p in PrimesUpTo(6000) | p mod 708 in {2, 65, 77, 89, 101, 113, 149, 161, 173, 185, 209, 221, 233, 269, 305, 329, 353, 365, 377, 401, 437, 485, 509, 533, 545, 569, 581, 629, 689, 701}]; // _Vincenzo Librandi_, Jul 30 2012
%K A139881 nonn,easy
%O A139881 1,1
%A A139881 _T. D. Noe_, May 02 2008