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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 17 |
| 3 | 393 |
| 4 | 25601 |
| 5 | 2044241 |
| 6 | 289407505 |
| 7 | 49702166681 |
| 8 | 12331304386689 |
| 9 | 3665631364571297 |
| 10 | 1415269826057944465 |
| 11 | 644290354204397460137 |
| 12 | 358377106160586506065793 |
| 13 | 231185244070754402809628657 |
[1,1,17,393,25601,2044241,289407505,49702166681, 12331304386689,3665631364571297, 1415269826057944465,644290354204397460137, 358377106160586506065793, 231185244070754402809628657] |