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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 25 |
| 4 | 925 |
| 5 | 1625 |
| 6 | 1105 |
| 7 | 47125 |
| 8 | 350285 |
| 9 | 493025 |
| 10 | 3572465 |
| 11 | 47074105 |
| 12 | 13818025 |
| 13 | 4109345825 |
| 14 | 171921425 |
| 15 | 294346585 |
| 16 | 130334225125 |
| 17 | 190608050165 |
| 18 | 2687125303525 |
| 19 | 2406144489125 |
| 20 | 5821530534625 |
| 21 | 49723952067725 |
| 22 | 1500939251825 |
| 23 | 665571884367325 |
| 24 | 8362509238504525 |
| 25 | 1344402738869125 |
[1,5,25,925,1625,1105,47125,350285,493025,3572465, 47074105,13818025,4109345825,171921425,294346585, 130334225125,190608050165,2687125303525, 2406144489125,5821530534625,49723952067725, 1500939251825,665571884367325,8362509238504525, 1344402738869125] |