A135399 - cp's OEIS frontend

A135399 a(n) = (-1)^n + (-2)^n + 3^n (-1, -2 and 3 are the roots of the equation x^3 = 7*x + 6).

n	a(n)
0	3
1	0
2	14
3	18
4	98
5	210
6	794
7	2058
8	6818
9	19170
10	60074
11	175098
12	535538
13	1586130
14	4799354
15	14316138
16	43112258
17	129009090
18	387682634
19	1161737178
20	3487832978
21	10458256050
22	31385253914
23	94134790218
24	282446313698
25	847255055010
26	2541932937194
27	7625463267258

[3, 0, 14, 18, 98, 210, 794, 2058, 6818, 19170, 60074, 175098, 535538, 1586130, 4799354, 14316138, 43112258, 129009090, 387682634, 1161737178, 3487832978, 10458256050, 31385253914, 94134790218, 282446313698, 847255055010, 2541932937194, 7625463267258]

cp's OEIS Frontend

A135399 a(n) = (-1)^n + (-2)^n + 3^n (-1, -2 and 3 are the roots of the equation x^3 = 7*x + 6).

Table of values

List of values