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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 1512 |
| 3 | 813744 |
| 4 | 281434656 |
| 5 | 129501949608 |
| 6 | 56296822560480 |
| 7 | 26218237904433888 |
| 8 | 12242575532254540032 |
| 9 | 5850239653863742634172 |
| 10 | 2820869122426120317439152 |
| 11 | 1375631026432164061822527120 |
| 12 | 675950202173640832786529615232 |
[1,12,1512,813744,281434656,129501949608, 56296822560480,26218237904433888, 12242575532254540032,5850239653863742634172, 2820869122426120317439152, 1375631026432164061822527120, 675950202173640832786529615232] |