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| n | a(n) |
|---|---|
| 1 | 255 |
| 2 | 2310 |
| 3 | 20400 |
| 4 | 180195 |
| 5 | 1590378 |
| 6 | 14037225 |
| 7 | 123893883 |
| 8 | 1093502865 |
| 9 | 9651382368 |
| 10 | 85184227872 |
| 11 | 751845910863 |
| 12 | 6635879577384 |
| 13 | 58569045932253 |
| 14 | 516937220242281 |
| 15 | 4562548107080751 |
| 16 | 40269580936702038 |
| 17 | 355424011046747292 |
[255,2310,20400,180195,1590378,14037225,123893883, 1093502865,9651382368,85184227872,751845910863, 6635879577384,58569045932253,516937220242281, 4562548107080751,40269580936702038, 355424011046747292] |