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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 22 |
| 4 | 1250 |
| 5 | 24236 |
| 6 | 4851360 |
| 7 | 190497926 |
| 8 | 83943993818 |
| 9 | 5303141087778 |
| 10 | 4173873098644366 |
| 11 | 378359478068949014 |
| 12 | 472112409203884877570 |
| 13 | 57309542487149770566536 |
| 14 | 104912731359552572271902248 |
| 15 | 16280064095604977906371524266 |
| 16 | 41397926646267697867589499650186 |
[1,1,5,22,1250,24236,4851360,190497926, 83943993818,5303141087778,4173873098644366, 378359478068949014,472112409203884877570, 57309542487149770566536, 104912731359552572271902248, 16280064095604977906371524266, 41397926646267697867589499650186] |