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| n | a(n) |
|---|---|
| 6 | 6 |
| 7 | 1302 |
| 8 | 101136 |
| 9 | 5143824 |
| 10 | 210198240 |
| 11 | 7593173280 |
| 12 | 255415628160 |
| 13 | 8252203639680 |
| 14 | 261173083691520 |
| 15 | 8202954132172800 |
| 16 | 257956727815987200 |
| 17 | 8172268419809894400 |
| 18 | 261973287647034163200 |
| 19 | 8524055367713146060800 |
[6,1302,101136,5143824,210198240,7593173280, 255415628160,8252203639680,261173083691520, 8202954132172800,257956727815987200, 8172268419809894400,261973287647034163200, 8524055367713146060800] |