The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 243 |
| 4 | 6480 |
| 5 | 103680 |
| 6 | 2080800 |
| 7 | 42166080 |
| 8 | 833285376 |
| 9 | 16312907520 |
| 10 | 325995321600 |
| 11 | 6453963360000 |
| 12 | 127720737849600 |
| 13 | 2530106562316032 |
| 14 | 50139779258799360 |
| 15 | 992798704350478080 |
| 16 | 19665530247158611200 |
| 17 | 389544838379796084480 |
[1,8,243,6480,103680,2080800,42166080,833285376, 16312907520,325995321600,6453963360000, 127720737849600,2530106562316032, 50139779258799360,992798704350478080, 19665530247158611200,389544838379796084480] |