n | a(n) |
---|---|
1 | 4 |
2 | 4 |
3 | 20 |
4 | 100 |
5 | 500 |
6 | 5000 |
7 | 50000 |
8 | 500000 |
9 | 5000000 |
10 | 50000000 |
11 | 500000000 |
12 | 5000000000 |
13 | 50000000000 |
14 | 500000000000 |
15 | 5000000000000 |
16 | 50000000000000 |
17 | 500000000000000 |
18 | 5000000000000000 |
19 | 50000000000000000 |
20 | 500000000000000000 |
[4,4,20,100,500,5000,50000,500000,5000000, 50000000,500000000,5000000000,50000000000, 500000000000,5000000000000,50000000000000, 500000000000000,5000000000000000, 50000000000000000,500000000000000000] |