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| n | a(n) |
|---|---|
| 5 | 56 |
| 6 | 9408 |
| 7 | 11270400 |
| 8 | 27206658048 |
| 9 | 112681643083776 |
| 10 | 746988383076286464 |
| 11 | 7533492323047902093312 |
| 12 | 111048869433803210653040640 |
| 13 | 2315236533572491933131807916032 |
| 14 | 66415035616070432053233927044726784 |
| 15 | 2560483881619577552584872021599994249216 |
[56,9408,11270400,27206658048,112681643083776, 746988383076286464,7533492323047902093312, 111048869433803210653040640, 2315236533572491933131807916032, 66415035616070432053233927044726784, 2560483881619577552584872021599994249216] |