n | a(n) |
---|---|
0 | 0 |
1 | 9 |
2 | 99 |
3 | 999 |
4 | 9999 |
5 | 99999 |
6 | 999999 |
7 | 9999999 |
8 | 99999999 |
9 | 999999999 |
10 | 9999999999 |
11 | 99999999999 |
12 | 999999999999 |
13 | 9999999999999 |
14 | 99999999999999 |
15 | 999999999999999 |
16 | 9999999999999999 |
17 | 99999999999999999 |
18 | 999999999999999999 |
19 | 9999999999999999999 |
20 | 99999999999999999999 |
21 | 999999999999999999999 |
22 | 9999999999999999999999 |
[0,9,99,999,9999,99999,999999,9999999,99999999, 999999999,9999999999,99999999999,999999999999, 9999999999999,99999999999999,999999999999999, 9999999999999999,99999999999999999, 999999999999999999,9999999999999999999, 99999999999999999999,999999999999999999999, 9999999999999999999999] |