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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 15 |
| 3 | 195 |
| 4 | 4095 |
| 5 | 2477475 |
| 6 | 448422975 |
| 7 | 19384876786275 |
| 8 | 70676639845770308825475 |
| 9 | 11604095937711402889585984522057770447375 |
| 10 | 56023729629975618843823135187551800751351023283966800458449243286895375 |
[3,15,195,4095,2477475,448422975,19384876786275, 70676639845770308825475, 11604095937711402889585984522057770447375, 56023729629975618843823135187551800751351023283966\ 800458449243286895375] |