The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 55 |
| 3 | 575 |
| 4 | 5775 |
| 5 | 57775 |
| 6 | 577775 |
| 7 | 5772775 |
| 8 | 57722775 |
| 9 | 577212775 |
| 10 | 5772112775 |
| 11 | 57721512775 |
| 12 | 577215512775 |
| 13 | 5772156512775 |
| 14 | 57721566512775 |
| 15 | 577215666512775 |
| 16 | 5772156666512775 |
| 17 | 57721566466512775 |
| 18 | 577215664466512775 |
[5,55,575,5775,57775,577775,5772775,57722775, 577212775,5772112775,57721512775,577215512775, 5772156512775,57721566512775,577215666512775, 5772156666512775,57721566466512775, 577215664466512775] |