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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 1064 |
| 4 | 252160 |
| 5 | 115315200 |
| 6 | 86449126400 |
| 7 | 96313245952000 |
| 8 | 149342026677043200 |
| 9 | 307513455044956160000 |
| 10 | 811744577542368870400000 |
| 11 | 2672529840751688498380800000 |
| 12 | 10735527449319396895332761600000 |
| 13 | 51677469466519591978527317032960000 |
| 14 | 293652804750537765304678163152896000000 |
[1,12,1064,252160,115315200,86449126400, 96313245952000,149342026677043200, 307513455044956160000,811744577542368870400000, 2672529840751688498380800000, 10735527449319396895332761600000, 51677469466519591978527317032960000, 293652804750537765304678163152896000000] |