A152011 - cp's OEIS frontend

A152011 a(0) = 1 and a(n) = (3^n - (-1)^n)/2 for n >= 1.

n	a(n)
0	1
1	2
2	4
3	14
4	40
5	122
6	364
7	1094
8	3280
9	9842
10	29524
11	88574
12	265720
13	797162
14	2391484
15	7174454
16	21523360
17	64570082
18	193710244
19	581130734
20	1743392200
21	5230176602
22	15690529804
23	47071589414
24	141214768240
25	423644304722

[1, 2, 4, 14, 40, 122, 364, 1094, 3280, 9842, 29524, 88574, 265720, 797162, 2391484, 7174454, 21523360, 64570082, 193710244, 581130734, 1743392200, 5230176602, 15690529804, 47071589414, 141214768240, 423644304722]

cp's OEIS Frontend

A152011 a(0) = 1 and a(n) = (3^n - (-1)^n)/2 for n >= 1.

Table of values

List of values