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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 3277 |
| 8 | 14317213 |
| 9 | 57741320029 |
| 10 | 237435704507485 |
| 11 | 971588061067577437 |
| 12 | 3980596286193864759389 |
| 13 | 16303527542855381993658461 |
| 14 | 66780267552779682073190144093 |
| 15 | 273530932713230996784935699290205 |
[1,3277,14317213,57741320029,237435704507485, 971588061067577437,3980596286193864759389, 16303527542855381993658461, 66780267552779682073190144093, 273530932713230996784935699290205] |