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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 16200 |
| 3 | 0 |
| 4 | 43750800 |
| 5 | 0 |
| 6 | 47297528280 |
| 7 | 0 |
| 8 | 27425793987360 |
| 9 | 0 |
| 10 | 9912269336940648 |
| 11 | 0 |
| 12 | 2448015194902257840 |
| 13 | 0 |
| 14 | 439668298578779894520 |
| 15 | 0 |
| 16 | 60071753985937273120320 |
| 17 | 0 |
| 18 | 6460749140008058788098440 |
| 19 | 0 |
| 20 | 561838152794479347081022416 |
| 21 | 0 |
| 22 | 40369733975261540188277953560 |
| 23 | 0 |
| 24 | 2439893679823103970428776675680 |
| 25 | 0 |
[1,0,16200,0,43750800,0,47297528280,0, 27425793987360,0,9912269336940648,0, 2448015194902257840,0,439668298578779894520,0, 60071753985937273120320,0, 6460749140008058788098440,0, 561838152794479347081022416,0, 40369733975261540188277953560,0, 2439893679823103970428776675680,0] |