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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 131 |
| 4 | 4163 |
| 5 | 305430 |
| 6 | 55930891 |
| 7 | 25000646212 |
| 8 | 27295999984619 |
| 9 | 72988931277612942 |
| 10 | 477182559947251724928 |
| 11 | 7632223466274455982169083 |
| 12 | 298610649015649904265150954293 |
| 13 | 28578493893088208888472545213927279 |
[2,11,131,4163,305430,55930891,25000646212, 27295999984619,72988931277612942, 477182559947251724928,7632223466274455982169083, 298610649015649904265150954293, 28578493893088208888472545213927279] |