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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 16 |
| 3 | 306 |
| 4 | 6321 |
| 5 | 136311 |
| 6 | 3021276 |
| 7 | 68250216 |
| 8 | 1563397131 |
| 9 | 36195839771 |
| 10 | 845073322136 |
| 11 | 19864512260726 |
| 12 | 469561887175791 |
| 13 | 11151848709622581 |
| 14 | 265910204875935096 |
| 15 | 6362320059617532336 |
| 16 | 152684022853771521426 |
[1,16,306,6321,136311,3021276,68250216,1563397131, 36195839771,845073322136,19864512260726, 469561887175791,11151848709622581, 265910204875935096,6362320059617532336, 152684022853771521426] |