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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 6210 |
| 6 | 20592419760 |
| 7 | 272039989206828885 |
| 8 | 11790866860533363630752256 |
| 9 | 1609379339428507638996616962234528 |
| 10 | 649308484381906359124692131947427492018400 |
[0,0,0,0,6210,20592419760,272039989206828885, 11790866860533363630752256, 1609379339428507638996616962234528, 649308484381906359124692131947427492018400] |