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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 25401600 |
| 12 | 174182400 |
| 13 | 1437004800 |
| 14 | 46942156800 |
| 15 | 301771008000 |
| 16 | 0 |
| 17 | 188305108992000 |
| 18 | 5272543051776000 |
| 19 | 30128817438720000 |
| 20 | 964122158039040000 |
| 21 | 24517325190758400000 |
| 22 | 118315866081853440000 |
| 23 | 16505063318418554880000 |
| 24 | 283958078596448256000000 |
[0,0,0,0,0,0,0,0,0,0,25401600,174182400, 1437004800,46942156800,301771008000,0, 188305108992000,5272543051776000, 30128817438720000,964122158039040000, 24517325190758400000,118315866081853440000, 16505063318418554880000,283958078596448256000000] |