n | a(n) |
---|---|
1 | 4 |
2 | 13 |
3 | 40 |
4 | 130 |
5 | 400 |
6 | 1300 |
7 | 4000 |
8 | 13000 |
9 | 40000 |
10 | 130000 |
11 | 400000 |
12 | 1300000 |
13 | 4000000 |
14 | 13000000 |
15 | 40000000 |
16 | 130000000 |
17 | 400000000 |
18 | 1300000000 |
19 | 4000000000 |
20 | 13000000000 |
21 | 40000000000 |
22 | 130000000000 |
23 | 400000000000 |
24 | 1300000000000 |
[4,13,40,130,400,1300,4000,13000,40000,130000, 400000,1300000,4000000,13000000,40000000, 130000000,400000000,1300000000,4000000000, 13000000000,40000000000,130000000000,400000000000, 1300000000000] |