login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A227522 Values of n such that L(19) and N(19) 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. 2
-123, -221, -255, -311, 487, -561, 709, -1055, 1273, -1425, -1475, -1767, 1833, -1893, 2127, -2391, -2475, -2595, 2769, -2895, -3053, -3183, -3543, -3627, 3765, 3919, 4069, -4113, 4203, 4315, 4609, -4953, 5175, 5347, 5413, -5657, 6117, -6515, -6585, -6597, -6833, 6915 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Computed with PARI using commands similar to those used to compute A226921.

LINKS

Vincenzo Librandi and Joerg Arndt, Table of n, a(n) for n = 1..421

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, A227448, A227449, A227515-A227523.

Sequence in context: A302459 A179127 A153254 * A193431 A306643 A303241

Adjacent sequences:  A227519 A227520 A227521 * A227523 A227524 A227525

KEYWORD

sign,easy

AUTHOR

Vincenzo Librandi, Jul 14 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)