n | a(n) |
---|---|
2 | 9 |
3 | 88 |
4 | 999 |
5 | 9999 |
6 | 77777 |
7 | 999999 |
8 | 9999999 |
9 | 88888888 |
10 | 999999999 |
11 | 9999999999 |
12 | 77777777777 |
13 | 999999999999 |
14 | 9999999999999 |
15 | 88888888888888 |
16 | 999999999999999 |
17 | 9999999999999999 |
18 | 77777777777777777 |
19 | 999999999999999999 |
20 | 9999999999999999999 |
[9,88,999,9999,77777,999999,9999999,88888888, 999999999,9999999999,77777777777,999999999999, 9999999999999,88888888888888,999999999999999, 9999999999999999,77777777777777777, 999999999999999999,9999999999999999999] |