A191697 - cp's OEIS frontend

A191697 a(n) = r1^n + r2^n + r3^n where r1, r2, r3 are the three roots of x^3 - 2*x - 2 = 0.

n	a(n)
1	0
2	4
3	6
4	8
5	20
6	28
7	56
8	96
9	168
10	304
11	528
12	944
13	1664
14	2944
15	5216
16	9216
17	16320
18	28864
19	51072
20	90368
21	159872
22	282880
23	500480
24	885504
25	1566720
26	2771968
27	4904448
28	8677376
29	15352832
30	27163648
31	48060416
32	85032960
33	150448128
34	266186752
35	470962176
36	833269760

[0, 4, 6, 8, 20, 28, 56, 96, 168, 304, 528, 944, 1664, 2944, 5216, 9216, 16320, 28864, 51072, 90368, 159872, 282880, 500480, 885504, 1566720, 2771968, 4904448, 8677376, 15352832, 27163648, 48060416, 85032960, 150448128, 266186752, 470962176, 833269760]

cp's OEIS Frontend

A191697 a(n) = r1^n + r2^n + r3^n where r1, r2, r3 are the three roots of x^3 - 2*x - 2 = 0.

Table of values

List of values