-8165domain: ZAppears in sequencesValues of n such that L(6) and N(6) 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.at n=40A226926Expansion of 1/((1-x)^2*(1-2*x+2*x^2)).at n=24A279230