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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1444 |
| 3 | 42664 |
| 4 | 1094959 |
| 5 | 29377334 |
| 6 | 778500603 |
| 7 | 20707472573 |
| 8 | 550220030803 |
| 9 | 14624495679716 |
| 10 | 388675661283840 |
| 11 | 10330112591962531 |
| 12 | 274548845582551728 |
| 13 | 7296844499730463987 |
| 14 | 193932365230917334017 |
| 15 | 5154251053305056299587 |
[81,1444,42664,1094959,29377334,778500603, 20707472573,550220030803,14624495679716, 388675661283840,10330112591962531, 274548845582551728,7296844499730463987, 193932365230917334017,5154251053305056299587] |