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A280904 as a simple table
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 9 |
| 3 | 646 |
| 4 | 22568 |
| 5 | 492490 |
| 6 | 9426050 |
| 7 | 162640161 |
| 8 | 2636238543 |
| 9 | 40818734359 |
| 10 | 610807332682 |
| 11 | 8899797476985 |
| 12 | 126936297853576 |
| 13 | 1779063560531884 |
| 14 | 24572630681534366 |
| 15 | 335222285940398228 |
| 16 | 4524762545977409290 |
[0,9,646,22568,492490,9426050,162640161, 2636238543,40818734359,610807332682,8899797476985, 126936297853576,1779063560531884, 24572630681534366,335222285940398228, 4524762545977409290] |