%I
%S 101,625,665,1151,1211,1411,2209,2945,3469,4391,4681,4895,
%T 5945,6281,6305,6529,8125,8249,8269,8321,8605,9025,9821,10439,
%U 11659,13729,14429,14821,14875,15031,15545,15575,15601,15815,17215,17435,17615,17899,18965,19555,19775
%N Values of n such that L(18) and N(18) 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.
%C Computed with PARI using commands similar to those used to compute A226921.
%H Vincenzo Librandi and Joerg Arndt, <a href="/A227521/b227521.txt">Table of n, a(n) for n = 1..338</a>
%H Eric L. F. Roettger, <a href="http://people.ucalgary.ca/~hwilliam/files/A_Cubic_Extention_of_the_Lucas_Functions.pdf">A cubic extension of the Lucas functions</a>, Thesis, Dept. of Mathematics and Statistics, Univ. of Calgary, 2009. See page 195.
%Y Cf. A226921A226929, A227448, A227449, A227515A227523.
%K sign,easy
%O 1,1
%A _Vincenzo Librandi_, Jul 14 2013
