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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 5 |
| 3 | 2191 |
| 4 | 14424679 |
| 5 | 715535002730 |
| 6 | 207412191964163486 |
| 7 | 287389284114499903096180 |
| 8 | 1616438584669598518787107631636 |
| 9 | 32234252378649647001051217798280395344 |
[0,5,2191,14424679,715535002730, 207412191964163486,287389284114499903096180, 1616438584669598518787107631636, 32234252378649647001051217798280395344] |