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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 105 |
| 9 | 30016 |
| 10 | 11180820 |
| 11 | 5188453830 |
| 12 | 2977635137862 |
| 13 | 2099132870973600 |
| 14 | 1803595358964773088 |
| 15 | 1872726690127181663775 |
| 16 | 2329676580698022197516875 |
| 17 | 3443086402825299720403673760 |
| 18 | 5997229769947050271535917422040 |
| 19 | 12218901113752712984458458475480428 |
[1,0,0,0,0,0,0,1,105,30016,11180820,5188453830, 2977635137862,2099132870973600, 1803595358964773088,1872726690127181663775, 2329676580698022197516875, 3443086402825299720403673760, 5997229769947050271535917422040, 12218901113752712984458458475480428] |