n | a(n) |
---|---|
1 | 1 |
2 | 8 |
3 | 9 |
4 | 98 |
5 | 99 |
6 | 998 |
7 | 999 |
8 | 9998 |
9 | 9999 |
10 | 99998 |
11 | 99999 |
12 | 999998 |
13 | 999999 |
14 | 9999998 |
15 | 9999999 |
16 | 99999998 |
17 | 99999999 |
18 | 999999998 |
19 | 999999999 |
20 | 9999999998 |
21 | 9999999999 |
22 | 99999999998 |
23 | 99999999999 |
24 | 999999999998 |
25 | 999999999999 |
26 | 9999999999998 |
27 | 9999999999999 |
[1,8,9,98,99,998,999,9998,9999,99998,99999,999998, 999999,9999998,9999999,99999998,99999999, 999999998,999999999,9999999998,9999999999, 99999999998,99999999999,999999999998,999999999999, 9999999999998,9999999999999] |