A227448 Values of n such that L(10) and N(10) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.

-5, 349, 529, -575, -605, -719, -809, 1501, 1969, 2179, -2801, 3499, -3575, -3629, 4111, 4441, -4541, 4609, 5029, 5275, -5465, 5701, -6851, 7219, 7261, -7361, 7405, -8195, -8285, 8635, -8915, 8959, -8975, 9145, 9649, 9739, 9949, 9985, -10025, 10231, -11141, -11219, -11369, 11875, 12211, 12499, 12919

Offset

1,1

Links

Vincenzo Librandi and Joerg Arndt, Table of n, a(n) for n = 1..1000

Eric L. F. Roettger, A cubic extension of the Lucas functions, Thesis, Dept. of Mathematics and Statistics, Univ. of Calgary, 2009. See page 195.

Crossrefs

Cf. A226921-A226929, A227449, A227515-A227523.

Sequence in context: A059839 A300388 A269556 * A210820 A193806 A158105

Adjacent sequences: A227445 A227446 A227447 * A227449 A227450 A227451

Keyword

sign,easy

Author

Vincenzo Librandi, Jul 14 2013

Status

approved