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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 121 |
| 4 | 2209 |
| 5 | 51401 |
| 6 | 1457649 |
| 7 | 48774041 |
| 8 | 1880312129 |
| 9 | 82028211241 |
| 10 | 3993290362449 |
| 11 | 214543742998201 |
| 12 | 12606663551853409 |
| 13 | 804145149477634121 |
| 14 | 55332318403485181809 |
| 15 | 4084986234723143402201 |
| 16 | 322064057582671115832449 |
[1,9,121,2209,51401,1457649,48774041,1880312129, 82028211241,3993290362449,214543742998201, 12606663551853409,804145149477634121, 55332318403485181809,4084986234723143402201, 322064057582671115832449] |