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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 900 |
| 3 | 94080 |
| 4 | 11988900 |
| 5 | 1704214512 |
| 6 | 260453217024 |
| 7 | 41886697881600 |
| 8 | 6996546610936740 |
| 9 | 1203384096358158000 |
| 10 | 211855235800656848400 |
| 11 | 38011289046678107596800 |
| 12 | 6928290032159649797280000 |
| 13 | 1279703438754969901486464000 |
| 14 | 239070018975087493229806080000 |
[1,12,900,94080,11988900,1704214512,260453217024, 41886697881600,6996546610936740, 1203384096358158000,211855235800656848400, 38011289046678107596800,6928290032159649797280000, 1279703438754969901486464000, 239070018975087493229806080000] |