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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 64 |
| 4 | 908 |
| 5 | 29296 |
| 6 | 538517 |
| 7 | 10912865 |
| 8 | 202080075 |
| 9 | 11808714880 |
| 10 | 409351818615 |
| 11 | 15022337089473 |
| 12 | 422671294158187 |
| 13 | 16797595808657585 |
| 14 | 525856235658025845 |
| 15 | 17318652008137477581 |
| 16 | 541691832239493218144 |
| 17 | 30028029442866868463331 |
[1,0,64,908,29296,538517,10912865,202080075, 11808714880,409351818615,15022337089473, 422671294158187,16797595808657585, 525856235658025845,17318652008137477581, 541691832239493218144,30028029442866868463331] |