A318610 - cp's OEIS frontend

A318610 a(1) = 0, a(2) = 4, a(3) = 12; for n > 3, a(n) = 3a(n-1) - 3a(n-2) + 9*a(n-3).

n	a(n)
1	0
2	4
3	12
4	24
5	72
6	252
7	756
8	2160
9	6480
10	19764
11	59292
12	176904
13	530712
14	1595052
15	4785156
16	14346720
17	43040160
18	129146724
19	387440172
20	1162241784
21	3486725352
22	10460412252
23	31381236756
24	94143001680
25	282429005040
26	847289140884
27	2541867422652
28	7625595890664
29	22876787671992

[0, 4, 12, 24, 72, 252, 756, 2160, 6480, 19764, 59292, 176904, 530712, 1595052, 4785156, 14346720, 43040160, 129146724, 387440172, 1162241784, 3486725352, 10460412252, 31381236756, 94143001680, 282429005040, 847289140884, 2541867422652, 7625595890664, 22876787671992]

cp's OEIS Frontend

A318610 a(1) = 0, a(2) = 4, a(3) = 12; for n > 3, a(n) = 3a(n-1) - 3a(n-2) + 9*a(n-3).

Table of values

List of values

cp's OEIS Frontend

A318610 a(1) = 0, a(2) = 4, a(3) = 12; for n > 3, a(n) = 3*a(n-1) - 3*a(n-2) + 9*a(n-3).

Table of values

List of values

A318610 a(1) = 0, a(2) = 4, a(3) = 12; for n > 3, a(n) = 3a(n-1) - 3a(n-2) + 9*a(n-3).