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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 10 |
| 4 | 269 |
| 5 | 10969 |
| 6 | 1091801 |
| 7 | 364785216 |
| 8 | 269830709761 |
| 9 | 511150044413047 |
[1,5,10,269,10969,1091801,364785216,269830709761, 511150044413047] |