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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 7 |
| 4 | 48 |
| 5 | 1015 |
| 6 | 19041 |
| 7 | 750083 |
| 8 | 67847199 |
| 9 | 10455199270 |
| 10 | 2719125337850 |
[1,5,7,48,1015,19041,750083,67847199,10455199270, 2719125337850] |