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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 4565 |
| 3 | 624227 |
| 4 | 93905509 |
| 5 | 13864972277 |
| 6 | 2054706174413 |
| 7 | 304265433695569 |
| 8 | 45062687311719797 |
| 9 | 6673721691080067317 |
| 10 | 988374130647554935157 |
| 11 | 146377412047334158410357 |
| 12 | 21678380394232186381827093 |
[21,4565,624227,93905509,13864972277, 2054706174413,304265433695569,45062687311719797, 6673721691080067317,988374130647554935157, 146377412047334158410357, 21678380394232186381827093] |