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 A140614 #20 Aug 05 2014 14:16:31 %S A140614 23,47,71,191,311,383,599,647,719,839,863,911,983,1103,1367,1439,1511, %T A140614 1607,1871,2039,2399,2423,2447,2663,2687,2711,2927,3023,3191,3359, %U A140614 3623,3719,3767,4007,4079,4271,4679,4799,4871,4943,5039,5087,5303 %N A140614 Primes of the form 15x^2+12xy+20y^2. %C A140614 Discriminant=-1056. Also primes of the form 23x^2+12xy+36y^2. %C A140614 In base 12 the sequence is 1E, 3E, 5E, 13E, 21E, 27E, 41E, 45E, 4EE, 59E, 5EE, 63E, 69E, 77E, 95E, 9EE, X5E, E1E, 10EE, 121E, 147E, 149E, 14EE, 165E, 167E, 169E, 183E, 18EE, 1X1E, 1E3E, 211E, 219E, 221E, 239E, 243E, 257E, 285E, 293E, 299E, 2X3E, 2XEE, 2E3E, 309E, where X is 10 and E is 11. Moreover, the discriminant is -740. - _Walter Kehowski_, May 31 2008 %H A140614 Vincenzo Librandi and Ray Chandler, <a href="/A140614/b140614.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi] %H A140614 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 A140614 Union[QuadPrimes2[15, 12, 20, 10000], QuadPrimes2[15, -12, 20, 10000]] (* see A106856 *) %Y A140614 Cf. A140633. %K A140614 nonn,easy %O A140614 1,1 %A A140614 _T. D. Noe_, May 19 2008