A129744 - cp's OEIS frontend

A129744 a(n) = -(u^n-1)*(v^n-1) with u = 1+sqrt(2), v = 1-sqrt(2).

n	a(n)
1	2
2	4
3	14
4	32
5	82
6	196
7	478
8	1152
9	2786
10	6724
11	16238
12	39200
13	94642
14	228484
15	551614
16	1331712
17	3215042
18	7761796
19	18738638
20	45239072
21	109216786
22	263672644
23	636562078
24	1536796800
25	3710155682
26	8957108164
27	21624372014
28	52205852192

[2, 4, 14, 32, 82, 196, 478, 1152, 2786, 6724, 16238, 39200, 94642, 228484, 551614, 1331712, 3215042, 7761796, 18738638, 45239072, 109216786, 263672644, 636562078, 1536796800, 3710155682, 8957108164, 21624372014, 52205852192]

cp's OEIS Frontend

A129744 a(n) = -(u^n-1)*(v^n-1) with u = 1+sqrt(2), v = 1-sqrt(2).

Table of values

List of values