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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 204 |
| 3 | 4488 |
| 4 | 121176 |
| 5 | 3877632 |
| 6 | 143472384 |
| 7 | 6025840128 |
| 8 | 283214486016 |
| 9 | 14727153272832 |
| 10 | 839447736551424 |
| 11 | 52045759666188288 |
| 12 | 3487065897634615296 |
| 13 | 251068744629692301312 |
| 14 | 19332293336486307201024 |
[1,12,204,4488,121176,3877632,143472384, 6025840128,283214486016,14727153272832, 839447736551424,52045759666188288, 3487065897634615296,251068744629692301312, 19332293336486307201024] |