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 A140623 #20 Aug 05 2014 14:16:32 %S A140623 131,179,251,419,491,659,971,1091,1499,1811,1979,2339,2531,2939,3251, %T A140623 3299,3371,3539,3779,3851,4091,4211,4931,5099,5171,5651,6491,6659, %U A140623 6899,6971,7019,7211,7331,8219,8291,9491,9539,9851,10091,10139,10331 %N A140623 Primes of the form 35x^2+30xy+51y^2. %C A140623 Discriminant=-6240. Also primes of the form 36x^2+12xy+131y^2. %C A140623 In base 12, the sequence is XE, 12E, 18E, 2XE, 34E, 46E, 68E, 76E, X4E, 106E, 118E, 142E, 156E, 184E, 1X6E, 1XXE, 1E4E, 206E, 222E, 228E, 244E, 252E, 2X2E, 2E4E, 2EXE, 332E, 390E, 3X2E, 3EXE, 404E, 408E, 420E, 42XE, 490E, 496E, 55XE, 562E, 584E, 5X0E, 5X4E, 5E8E, where X is 10 and E is 11. Moreover, the discriminant is -3740. - _Walter Kehowski_, Jun 01 2008 %H A140623 Vincenzo Librandi and Ray Chandler, <a href="/A140623/b140623.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A140623 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) %t A140623 Union[QuadPrimes2[35, 30, 51, 10000], QuadPrimes2[35, -30, 51, 10000]] (* see A106856 *) %Y A140623 Cf. A140633. %K A140623 nonn,easy %O A140623 1,1 %A A140623 _T. D. Noe_, May 19 2008 %E A140623 Corrected and extended b-file - _Ray Chandler_, Aug 02 2014