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A172609 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 12870 |
| 3 | 9465511770 |
| 4 | 99561092450391000 |
| 5 | 7656714453153197981835000 |
| 6 | 2889253496242619386328267523990000 |
| 7 | 4104167472585675600759440022842715359250000 |
| 8 | 18165723931630806756964027928179555634194028454000000 |
[1,1,12870,9465511770,99561092450391000, 7656714453153197981835000, 2889253496242619386328267523990000, 4104167472585675600759440022842715359250000, 18165723931630806756964027928179555634194028454000\ 000] |