n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 39 |
4 | 488 |
5 | 55555 |
6 | 88999 |
7 | 7777777 |
8 | 88888888 |
9 | 999999999 |
10 | 25555555555888 |
11 | 0 |
12 | 88888888999999 |
13 | 0 |
14 | 4777777777777778888 |
15 | 35555555555555559999999 |
16 | 2888888888888888888888 |
17 | 0 |
18 | 888888999999999999999999 |
19 | 0 |
20 | 2555555555555555555558888888888888 |
21 | 37777777777777777777779999999999 |
[1,4,39,488,55555,88999,7777777,88888888, 999999999,25555555555888,0,88888888999999,0, 4777777777777778888,35555555555555559999999, 2888888888888888888888,0,888888999999999999999999, 0,2555555555555555555558888888888888, 37777777777777777777779999999999] |