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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 192 |
| 4 | 16444 |
| 5 | 3207086 |
| 6 | 1258238720 |
| 7 | 916112394270 |
| 8 | 1168225267521350 |
| 9 | 2496696209705056142 |
| 10 | 8635565795744155161506 |
| 11 | 46977052491046305327286932 |
| 12 | 392416122247953159916295467008 |
| 13 | 4931628582570689013431218105121792 |
| 14 | 91603865924570978521516549662581412000 |
[1,1,6,192,16444,3207086,1258238720,916112394270, 1168225267521350,2496696209705056142, 8635565795744155161506,46977052491046305327286932, 392416122247953159916295467008, 4931628582570689013431218105121792, 91603865924570978521516549662581412000] |