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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11466 |
| 3 | 114660 |
| 4 | 411264 |
| 5 | 804384 |
| 6 | 871416 |
| 7 | 4999680 |
| 8 | 46332000 |
| 9 | 176417280 |
| 10 | 378069120 |
| 11 | 396168192 |
| 12 | 485188704 |
| 13 | 709430400 |
| 14 | 2004912000 |
| 15 | 3921372000 |
| 16 | 5600534400 |
| 17 | 6128179200 |
| 18 | 6956471808 |
| 19 | 7556976000 |
| 20 | 7746979968 |
| 21 | 9904204800 |
| 22 | 14092001280 |
| 23 | 14182439040 |
| 24 | 23423662080 |
| 25 | 31998395520 |
[1,11466,114660,411264,804384,871416,4999680, 46332000,176417280,378069120,396168192,485188704, 709430400,2004912000,3921372000,5600534400, 6128179200,6956471808,7556976000,7746979968, 9904204800,14092001280,14182439040,23423662080, 31998395520] |