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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 27 |
| 4 | 5407 |
| 5 | 4342243 |
| 6 | 6901005747 |
| 7 | 15991700209747 |
| 8 | 49095495585283107 |
| 9 | 191599412918800541319 |
| 10 | 926177959914373058950183 |
| 11 | 5437262155990618367824723855 |
| 12 | 38143289921919666735663285369003 |
| 13 | 315385817450046831082107268064273565 |
| 14 | 3037445494595218979993185134656710043205 |
[1,1,1,27,5407,4342243,6901005747,15991700209747, 49095495585283107,191599412918800541319, 926177959914373058950183, 5437262155990618367824723855, 38143289921919666735663285369003, 315385817450046831082107268064273565, 3037445494595218979993185134656710043205] |