-14429domain: ZAppears in sequencesa(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=3, a(1)=-1, a(2)=-1.at n=30A073145Expansion of (3 + 2*x + 3*x^2)/(1 + x + 3*x^2 - x^3).at n=15A073496Values 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.at n=26A227521