The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 64 |
| 3 | 640 |
| 4 | 6400 |
| 5 | 64000 |
| 6 | 640000 |
| 7 | 6400000 |
| 8 | 64000000 |
| 9 | 640000000 |
| 10 | 6400000000 |
| 11 | 64000000000 |
| 12 | 640000000000 |
| 13 | 6400000000000 |
| 14 | 64000000000000 |
| 15 | 640000000000000 |
| 16 | 6400000000000000 |
| 17 | 64000000000000000 |
| 18 | 640000000000000000 |
[8,64,640,6400,64000,640000,6400000,64000000, 640000000,6400000000,64000000000,640000000000, 6400000000000,64000000000000,640000000000000, 6400000000000000,64000000000000000, 640000000000000000] |