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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 12 |
| 3 | 104 |
| 4 | 1392 |
| 5 | 26912 |
| 6 | 745152 |
| 7 | 29170304 |
| 8 | 1609166592 |
| 9 | 124719636992 |
| 10 | 13580858084352 |
| 11 | 2077626948184064 |
| 12 | 446988353188687872 |
| 13 | 135342931175100588032 |
| 14 | 57738133535238631636992 |
| 15 | 34729785659702961812701184 |
| 16 | 29480128808177192701492396032 |
| 17 | 35332909777591732535498857644032 |
[1,2,12,104,1392,26912,745152,29170304,1609166592, 124719636992,13580858084352,2077626948184064, 446988353188687872,135342931175100588032, 57738133535238631636992, 34729785659702961812701184, 29480128808177192701492396032, 35332909777591732535498857644032] |