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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 311 |
| 7 | 43 |
| 8 | 337 |
| 9 | 193 |
| 10 | 333667 |
| 11 | 13421 |
| 12 | 266981089 |
| 13 | 28393 |
| 14 | 29914249171 |
| 15 | 10678711 |
| 16 | 1321 |
| 17 | 184417 |
| 18 | 7563707819165039903 |
| 19 | 236377 |
| 20 | 192696104561 |
| 21 | 920421641 |
| 22 | 12271836836138419 |
| 23 | 39700406579747 |
| 24 | 58769065453824529 |
| 25 | 152587500001 |
| 26 | 4315817869647001 |
| 27 | 797161 |
[2,3,7,13,311,43,337,193,333667,13421,266981089, 28393,29914249171,10678711,1321,184417, 7563707819165039903,236377,192696104561,920421641, 12271836836138419,39700406579747, 58769065453824529,152587500001,4315817869647001, 797161] |