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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 11 |
| 5 | 174599 |
| 6 | 7224839 |
| 7 | 10780559 |
| 8 | 10780559 |
| 9 | 1086338816639 |
| 10 | 50060257410239 |
| 11 | 7720634052774719 |
| 12 | 227457297898150319 |
| 13 | 7272877497848202239 |
| 14 | 7272877497848202239 |
[2,5,11,11,174599,7224839,10780559,10780559, 1086338816639,50060257410239,7720634052774719, 227457297898150319,7272877497848202239, 7272877497848202239] |