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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 23 |
| 3 | 2357 |
| 4 | 31719232931 |
| 5 | 3107109113127131137139149151157163167173 |
| 6 | 149151157163167173179181191193197199211223227229233 |
| 7 | 227229233239241251257263269271277281283293307311313317331337347349353359 |
[2,23,2357,31719232931, 3107109113127131137139149151157163167173, 14915115716316717317918119119319719921122322722923\ 3, 22722923323924125125726326927127728128329330731131\ 3317331337347349353359] |