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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 81 |
| 4 | 2796 |
| 5 | 285205 |
| 6 | 96322648 |
| 7 | 112087066485 |
| 8 | 458071927263177 |
| 9 | 6665704296474517580 |
| 10 | 349377209492189224235030 |
| 11 | 66602723163954143548104716149 |
| 12 | 46557323273646194397454383970079368 |
| 13 | 120168498151800396724425771086539073209571 |
| 14 | 1152049915423012273792614840558950392103437052846 |
[1,1,6,81,2796,285205,96322648,112087066485, 458071927263177,6665704296474517580, 349377209492189224235030, 66602723163954143548104716149, 46557323273646194397454383970079368, 120168498151800396724425771086539073209571, 1152049915423012273792614840558950392103437052846] |