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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 80 |
| 4 | 2432 |
| 5 | 247552 |
| 6 | 88060928 |
| 7 | 112371410944 |
| 8 | 523858015518720 |
| 9 | 9041009511609073664 |
| 10 | 583447777113052431515648 |
| 11 | 141885584718620229407228821504 |
| 12 | 130832005909904417592540055577034752 |
| 13 | 459749137931232137234615429529864283095040 |
| 14 | 6182706200522446492946534924719926752508110700544 |
[1,2,8,80,2432,247552,88060928,112371410944, 523858015518720,9041009511609073664, 583447777113052431515648, 141885584718620229407228821504, 130832005909904417592540055577034752, 459749137931232137234615429529864283095040, 6182706200522446492946534924719926752508110700544] |