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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6435 |
| 3 | 1577585295 |
| 4 | 4148378852099625 |
| 5 | 63805953776276649848625 |
| 6 | 4012852078114749147678149338875 |
| 7 | 814318942973348333484015877548157809375 |
| 8 | 450538787986875167583433232345723106006796340625 |
[1,1,6435,1577585295,4148378852099625, 63805953776276649848625, 4012852078114749147678149338875, 814318942973348333484015877548157809375, 450538787986875167583433232345723106006796340625] |