-395227906723domain: ZAppears in sequencesa(n) = 13*a(n-1) - 65*a(n-2) + 156*a(n-3) - 182*a(n-4) + 91*a(n-5) - 13*a(n-6), with initial terms 0, 0, -1, -8, -45, -221.at n=20A216540