228208503748domain: NAppears in sequencesa(n) = 6*a(n-1) - a(n-2) + 2, with a(0)=1, a(1)=4.at n=15A072221a(0)=4, a(1)=148, a(2)=5044; a(n) = 35*(a(n-1)-a(n-2))+a(n-3).at n=7A350985