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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2724 |
| 3 | 30013 |
| 4 | 162815 |
| 5 | 673229 |
| 6 | 2662626 |
| 7 | 10168992 |
| 8 | 38531995 |
| 9 | 145820265 |
| 10 | 550386072 |
| 11 | 2065878028 |
[81,2724,30013,162815,673229,2662626,10168992, 38531995,145820265,550386072,2065878028] |