

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.


20



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
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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. A226921A226929, A227449, A227515A227523.
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



