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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 324 |
| 3 | 1083 |
| 4 | 8321 |
| 5 | 62378 |
| 6 | 473185 |
| 7 | 3586068 |
| 8 | 27224209 |
| 9 | 206864716 |
| 10 | 1571281413 |
| 11 | 11942779144 |
| 12 | 90722922402 |
| 13 | 689405748706 |
| 14 | 5238174766697 |
| 15 | 39801761785044 |
| 16 | 302425691696718 |
| 17 | 2297924356585952 |
| 18 | 17460451254284279 |
| 19 | 132669830674540739 |
[16,324,1083,8321,62378,473185,3586068,27224209, 206864716,1571281413,11942779144,90722922402, 689405748706,5238174766697,39801761785044, 302425691696718,2297924356585952, 17460451254284279,132669830674540739] |