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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 88 |
| 3 | 1104 |
| 4 | 492624 |
| 5 | 30818736 |
| 6 | 200827760 |
| 7 | 1598249556 |
| 8 | 4575586644 |
| 9 | 8491046375 |
| 10 | 8554970196 |
| 11 | 29917317500 |
| 12 | 54481242640 |
| 13 | 202195886375 |
| 14 | 3201891498000 |
[1,88,1104,492624,30818736,200827760,1598249556, 4575586644,8491046375,8554970196,29917317500, 54481242640,202195886375,3201891498000] |