A122552 - cp's OEIS frontend

A122552 a(0)=a(1)=a(2)=1, a(n) = a(n-1) + a(n-2) + 2*a(n-3) for n > 2.

n	a(n)
0	1
1	1
2	1
3	4
4	7
5	13
6	28
7	55
8	109
9	220
10	439
11	877
12	1756
13	3511
14	7021
15	14044
16	28087
17	56173
18	112348
19	224695
20	449389
21	898780
22	1797559
23	3595117
24	7190236
25	14380471
26	28760941
27	57521884
28	115043767
29	230087533
30	460175068
31	920350135
32	1840700269
33	3681400540

[1, 1, 1, 4, 7, 13, 28, 55, 109, 220, 439, 877, 1756, 3511, 7021, 14044, 28087, 56173, 112348, 224695, 449389, 898780, 1797559, 3595117, 7190236, 14380471, 28760941, 57521884, 115043767, 230087533, 460175068, 920350135, 1840700269, 3681400540]

cp's OEIS Frontend

A122552 a(0)=a(1)=a(2)=1, a(n) = a(n-1) + a(n-2) + 2*a(n-3) for n > 2.

Table of values

List of values