A123102 - cp's OEIS frontend

A123102 a(0)=1, a(1)=0, a(2)=1, a(n) = a(n-1) + a(n-2) + 3*a(n-3).

n	a(n)
0	1
1	0
2	1
3	4
4	5
5	12
6	29
7	56
8	121
9	264
10	553
11	1180
12	2525
13	5364
14	11429
15	24368
16	51889
17	110544
18	235537
19	501748
20	1068917
21	2277276
22	4851437
23	10335464
24	22018729
25	46908504
26	99933625
27	212898316
28	453557453
29	966256644
30	2058509045
31	4385438048

[1, 0, 1, 4, 5, 12, 29, 56, 121, 264, 553, 1180, 2525, 5364, 11429, 24368, 51889, 110544, 235537, 501748, 1068917, 2277276, 4851437, 10335464, 22018729, 46908504, 99933625, 212898316, 453557453, 966256644, 2058509045, 4385438048]

cp's OEIS Frontend

A123102 a(0)=1, a(1)=0, a(2)=1, a(n) = a(n-1) + a(n-2) + 3*a(n-3).

Table of values

List of values