a(n) = - 6*a(n-1) - 9*a(n-2) - 3*a(n-3) with a(0)=3, a(1)=-6, a(2)=18.

A215634

a(n) = - 6*a(n-1) - 9*a(n-2) - 3*a(n-3) with a(0)=3, a(1)=-6, a(2)=18.

Terms

    a(0) =3a(1) =-6a(2) =18a(3) =-63a(4) =234a(5) =-891a(6) =3429a(7) =-13257a(8) =51354a(9) =-199098a(10) =772173a(11) =-2995218a(12) =11619045a(13) =-45073827a(14) =174857211a(15) =-678335958a(16) =2631522330a(17) =-10208681991a(18) =39603398850a(19) =-153636822171a(20) =596016389349

External references