-408855776domain: ZAppears in sequencesa(n) = -A001353(n).at n=16A106707a(n) = - 4*a(n-2) - a(n-4), a(0) = 1, a(1) = -4, a(2) = -6, a(3) = 15.at n=29A109731a(0) = 1, a(1) = -4, a(n) = -4*a(n-1) - a(n-2) for n > 1.at n=15A125905