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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 29 |
| 3 | 504 |
| 4 | 12885 |
| 5 | 438048 |
| 6 | 18648273 |
| 7 | 955478016 |
| 8 | 57293930313 |
| 9 | 3938025600000 |
| 10 | 305336853105669 |
| 11 | 26369255495467008 |
| 12 | 2510493688261968669 |
| 13 | 261252072029313662976 |
| 14 | 29504344983796139765625 |
| 15 | 3594050725647273953329152 |
| 16 | 469749733096169195471535633 |
| 17 | 65575342339459194563110895616 |
[1,3,29,504,12885,438048,18648273,955478016, 57293930313,3938025600000,305336853105669, 26369255495467008,2510493688261968669, 261252072029313662976,29504344983796139765625, 3594050725647273953329152, 469749733096169195471535633, 65575342339459194563110895616] |