A071618 - cp's OEIS frontend

A071618 a(n+1) - 3*a(n) + a(n-1) = (2/3)(1+w^(n+1)+w^(2n+2)), where w = exp(2 Pi I / 3).

n	a(n)
0	0
1	1
2	3
3	8
4	23
5	61
6	160
7	421
8	1103
9	2888
10	7563
11	19801
12	51840
13	135721
14	355323
15	930248
16	2435423
17	6376021
18	16692640
19	43701901
20	114413063
21	299537288
22	784198803
23	2053059121
24	5374978560
25	14071876561
26	36840651123
27	96450076808
28	252509579303

[0, 1, 3, 8, 23, 61, 160, 421, 1103, 2888, 7563, 19801, 51840, 135721, 355323, 930248, 2435423, 6376021, 16692640, 43701901, 114413063, 299537288, 784198803, 2053059121, 5374978560, 14071876561, 36840651123, 96450076808, 252509579303]

cp's OEIS Frontend

A071618 a(n+1) - 3*a(n) + a(n-1) = (2/3)(1+w^(n+1)+w^(2n+2)), where w = exp(2 Pi I / 3).

Table of values

List of values