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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 71 |
| 4 | 1279 |
| 5 | 31142 |
| 6 | 958127 |
| 7 | 35674921 |
| 8 | 1560207964 |
| 9 | 78410153193 |
| 10 | 4453247964775 |
| 11 | 282086867840252 |
| 12 | 19718661737739301 |
| 13 | 1507855981764016549 |
| 14 | 125211854842018500134 |
| 15 | 11220898483255456505555 |
| 16 | 1079389691811367897870339 |
| 17 | 110936313685240067472613726 |
[1,1,6,71,1279,31142,958127,35674921,1560207964, 78410153193,4453247964775,282086867840252, 19718661737739301,1507855981764016549, 125211854842018500134,11220898483255456505555, 1079389691811367897870339, 110936313685240067472613726] |