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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1575 |
| 3 | 38457 |
| 4 | 1024071 |
| 5 | 28271577 |
| 6 | 792881031 |
| 7 | 22392745881 |
| 8 | 634400697159 |
| 9 | 17998034165721 |
| 10 | 510923724667143 |
| 11 | 14507984391789081 |
| 12 | 412013548109024967 |
| 13 | 11701449873880124505 |
| 14 | 332336795068373382279 |
| 15 | 9438910778776181239449 |
[81,1575,38457,1024071,28271577,792881031, 22392745881,634400697159,17998034165721, 510923724667143,14507984391789081, 412013548109024967,11701449873880124505, 332336795068373382279,9438910778776181239449] |