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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 76 |
| 4 | 985 |
| 5 | 17046 |
| 6 | 366289 |
| 7 | 9374968 |
| 8 | 278095761 |
| 9 | 9375293170 |
| 10 | 353906211241 |
| 11 | 14785127222724 |
| 12 | 677150215857193 |
| 13 | 33734100501544366 |
| 14 | 1816008001717251105 |
| 15 | 105048613959883117936 |
| 16 | 6497985798745934394529 |
| 17 | 427999600108502895779658 |
[1,2,9,76,985,17046,366289,9374968,278095761, 9375293170,353906211241,14785127222724, 677150215857193,33734100501544366, 1816008001717251105,105048613959883117936, 6497985798745934394529,427999600108502895779658] |