A123109 - cp's OEIS frontend

A123109 a(0) = 1, a(1) = 3, a(n) = 3*a(n-1) + 3 for n > 1.

n	a(n)
0	1
1	3
2	12
3	39
4	120
5	363
6	1092
7	3279
8	9840
9	29523
10	88572
11	265719
12	797160
13	2391483
14	7174452
15	21523359
16	64570080
17	193710243
18	581130732
19	1743392199
20	5230176600
21	15690529803
22	47071589412
23	141214768239
24	423644304720
25	1270932914163

[1, 3, 12, 39, 120, 363, 1092, 3279, 9840, 29523, 88572, 265719, 797160, 2391483, 7174452, 21523359, 64570080, 193710243, 581130732, 1743392199, 5230176600, 15690529803, 47071589412, 141214768239, 423644304720, 1270932914163]

cp's OEIS Frontend

A123109 a(0) = 1, a(1) = 3, a(n) = 3*a(n-1) + 3 for n > 1.

Table of values

List of values