VOOZH about

URL: https://oeis.org/A140629

⇱ A140629 - OEIS

login
A140629
Primes of the form 76x^2+20xy+145y^2.
1
241, 409, 769, 1321, 1489, 2281, 3001, 4129, 4441, 5449, 5689, 6121, 6481, 6961, 7129, 7321, 7369, 8209, 9001, 11161, 11329, 11689, 12241, 12409, 13249, 13681, 13921, 14929, 15361, 16369, 16729, 17041, 17401, 17569, 17881, 18049, 18289
OFFSET
1,1
COMMENTS
Discriminant=-43680. Also primes of the form 96x^2+72xy+241y^2.
In base 12, the sequence is 181, 2X1, 541, 921, X41, 13X1, 18X1, 2481, 26X1, 31X1, 3361, 3661, 3901, 4041, 4161, 42X1, 4321, 4901, 5261, 6561, 6681, 6921, 7101, 7221, 7801, 7E01, 8081, 8781, 8X81, 9581, 9821, 9X41, X0X1, X201, X421, X541, X701, where X is 10 and E is 11. Moreover, the discriminant is -21340. - Walter Kehowski, Jun 01 2008
LINKS
Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
MATHEMATICA
Union[QuadPrimes2[76, 20, 145, 10000], QuadPrimes2[76, -20, 145, 10000]] (* see A106856 *)
CROSSREFS
Cf. A140633.
Sequence in context: A050968 A142918 A139502 * A325088 A321582 A137771
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 19 2008
STATUS
approved