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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 23 |
| 3 | 3919 |
| 4 | 1400972 |
| 5 | 1332221503 |
| 6 | 2440266733544 |
| 7 | 9013120937567806 |
| 8 | 47710925260763230958 |
| 9 | 503649376979113850651329 |
| 10 | 5954610779280903922363948937 |
| 11 | 114594038963707117577230115067496 |
[2,23,3919,1400972,1332221503,2440266733544, 9013120937567806,47710925260763230958, 503649376979113850651329, 5954610779280903922363948937, 114594038963707117577230115067496] |