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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 27 |
| 3 | 846 |
| 4 | 32290 |
| 5 | 1472535 |
| 6 | 78444261 |
| 7 | 4789283212 |
| 8 | 329976556596 |
| 9 | 25336918039005 |
| 10 | 2145912573891295 |
| 11 | 198763621138900026 |
| 12 | 19988975122377164982 |
| 13 | 2169175884299414423251 |
| 14 | 252661578519463668740745 |
| 15 | 31442098485128401965118680 |
| 16 | 4163361054820272025075769896 |
[0,1,27,846,32290,1472535,78444261,4789283212, 329976556596,25336918039005,2145912573891295, 198763621138900026,19988975122377164982, 2169175884299414423251,252661578519463668740745, 31442098485128401965118680, 4163361054820272025075769896] |