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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 37 |
| 6 | 73 |
| 7 | 229 |
| 8 | 1873 |
| 9 | 4957 |
| 10 | 7159 |
| 11 | 29599 |
| 12 | 293599 |
| 13 | 2953123 |
| 14 | 9476647 |
| 15 | 1643049664639 |
| 16 | 30501459767616059381067752838134765623 |
| 17 | 75901465778001946800870398616055887199 |
| 18 | 168354282831355577455162448188672669399 |
| 19 | 73004868196707960876168803928840928829809 |
[2,3,5,7,37,73,229,1873,4957,7159,29599,293599, 2953123,9476647,1643049664639, 30501459767616059381067752838134765623, 75901465778001946800870398616055887199, 168354282831355577455162448188672669399, 73004868196707960876168803928840928829809] |