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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 250 |
| 6 | 735 |
| 7 | 2500 |
| 8 | 25000 |
| 9 | 250000 |
| 10 | 1858560 |
| 11 | 2500000 |
| 12 | 18585600 |
| 13 | 25000000 |
| 14 | 91990080 |
| 15 | 185856000 |
| 16 | 242121642 |
| 17 | 250000000 |
| 18 | 919900800 |
| 19 | 1081088775 |
| 20 | 1390120992 |
| 21 | 1768635648 |
| 22 | 1858560000 |
| 23 | 2500000000 |
| 24 | 5435938431 |
| 25 | 7245987840 |
| 26 | 9199008000 |
| 27 | 9475854336 |
| 28 | 17996666688 |
| 29 | 18585600000 |
| 30 | 24214634829 |
| 31 | 25000000000 |
[2,3,5,7,250,735,2500,25000,250000,1858560, 2500000,18585600,25000000,91990080,185856000, 242121642,250000000,919900800,1081088775, 1390120992,1768635648,1858560000,2500000000, 5435938431,7245987840,9199008000,9475854336, 17996666688,18585600000,24214634829,25000000000] |