A109518 - cp's OEIS frontend

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)].

n	a(n)
1	1
2	3
3	38
4	783
5	22480
6	828000
7	37231704
8	1977187485
9	121098539008
10	8403438270285
11	651608685100000
12	55835951178466800
13	5239593453691293696
14	534383614812622168191
15	58857325474654519917440

[1, 3, 38, 783, 22480, 828000, 37231704, 1977187485, 121098539008, 8403438270285, 651608685100000, 55835951178466800, 5239593453691293696, 534383614812622168191, 58857325474654519917440]

cp's OEIS Frontend

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)].

Table of values

List of values