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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 24 |
| 4 | 1216 |
| 5 | 232960 |
| 6 | 164069376 |
| 7 | 428074336256 |
| 8 | 4220285062479872 |
| 9 | 160166476125189439488 |
| 10 | 23705806454651474422005760 |
| 11 | 13794322751716126282614505996288 |
| 12 | 31714534285699906476309208596247216128 |
| 13 | 288989543377657933541050197425959169851129856 |
[1,2,24,1216,232960,164069376,428074336256, 4220285062479872,160166476125189439488, 23705806454651474422005760, 13794322751716126282614505996288, 31714534285699906476309208596247216128, 288989543377657933541050197425959169851129856] |