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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 652 |
| 3 | 19805 |
| 4 | 328160 |
| 5 | 4331928 |
| 6 | 50919512 |
| 7 | 557478448 |
| 8 | 5814322288 |
| 9 | 58526242224 |
| 10 | 573293485312 |
| 11 | 5495680088320 |
| 12 | 51763989177088 |
| 13 | 480493519118080 |
| 14 | 4405407183929600 |
| 15 | 39966207303657728 |
| 16 | 359270403366182912 |
[3,652,19805,328160,4331928,50919512,557478448, 5814322288,58526242224,573293485312,5495680088320, 51763989177088,480493519118080,4405407183929600, 39966207303657728,359270403366182912] |