n | a(n) |
---|---|
1 | 5 |
2 | 7 |
3 | 557 |
4 | 577 |
5 | 757 |
6 | 5557 |
7 | 7577 |
8 | 7757 |
9 | 57557 |
10 | 75557 |
11 | 75577 |
12 | 77557 |
13 | 555557 |
14 | 575557 |
15 | 575777 |
16 | 577757 |
17 | 757577 |
18 | 775757 |
19 | 775777 |
20 | 5555777 |
21 | 5557757 |
22 | 5575777 |
23 | 5577577 |
24 | 5755577 |
25 | 5775557 |
26 | 5777557 |
27 | 7575577 |
28 | 7577777 |
29 | 55555777 |
30 | 55575757 |
31 | 55755757 |
32 | 55757777 |
33 | 57557557 |
[5,7,557,577,757,5557,7577,7757,57557,75557,75577, 77557,555557,575557,575777,577757,757577,775757, 775777,5555777,5557757,5575777,5577577,5755577, 5775557,5777557,7575577,7577777,55555777,55575757, 55755757,55757777,57557557] |