-3611

Appears in sequences

• a(n) = -(1/2)*(n+2)*(n^2 - 6*n - 1).at n=21A028494
• Values of n such that L(2) and N(2) 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=35A226922