n | a(n) |
---|---|
1 | 7 |
2 | 71 |
3 | 73 |
4 | 79 |
5 | 733 |
6 | 7333 |
7 | 79999 |
8 | 733333 |
9 | 799999 |
10 | 71111111 |
11 | 799999999 |
12 | 79999999999 |
13 | 79999999999999999999999999 |
14 | 79999999999999999999999999999999999999999999999999 |
[7,71,73,79,733,7333,79999,733333,799999,71111111, 799999999,79999999999,79999999999999999999999999, 79999999999999999999999999999999999999999999999999\ ] |