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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 5012280 |
| 5 | 1328431104 |
| 6 | 126565770240 |
| 7 | 5972419215360 |
| 8 | 168204503146680 |
| 9 | 3197102083768320 |
| 10 | 44523365649444864 |
| 11 | 482515310674575360 |
| 12 | 4247360089581903840 |
| 13 | 31425180086324183040 |
| 14 | 200349761482490480640 |
[1,0,0,0,5012280,1328431104,126565770240, 5972419215360,168204503146680,3197102083768320, 44523365649444864,482515310674575360, 4247360089581903840,31425180086324183040, 200349761482490480640] |