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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 984 |
| 3 | 12014 |
| 4 | 83436 |
| 5 | 721854 |
| 6 | 5016852 |
| 7 | 42143930 |
| 8 | 257895268 |
| 9 | 2084528746 |
| 10 | 12713615332 |
| 11 | 102302637674 |
| 12 | 609602834160 |
| 13 | 4861186951014 |
| 14 | 29162489418784 |
| 15 | 231673032285662 |
| 16 | 1389160154318372 |
[81,984,12014,83436,721854,5016852,42143930, 257895268,2084528746,12713615332,102302637674, 609602834160,4861186951014,29162489418784, 231673032285662,1389160154318372] |