a(n)=the (1,2)-entry of the n-th power of the 2 X 2 matrix [0,1;n-1,3(n-1)].
A109518
a(n)=the (1,2)-entry of the n-th power of the 2 X 2 matrix [0,1;n-1,3(n-1)].
Terms
- a(0) =1a(1) =3a(2) =38a(3) =783a(4) =22480a(5) =828000a(6) =37231704a(7) =1977187485a(8) =121098539008
External references
- oeis: A109518