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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 7 |
| 4 | 25 |
| 5 | 385 |
| 6 | 79625 |
| 7 | 1925 |
| 8 | 14889875 |
| 9 | 116491375 |
| 10 | 4094715625 |
| 11 | 32534376875 |
| 12 | 49558343209375 |
| 13 | 2505147019375 |
| 14 | 118055053288046875 |
| 15 | 13604013002689484375 |
| 16 | 70242756706387890625 |
| 17 | 25617946563506171875 |
| 18 | 1532331197299213611691015625 |
| 19 | 167669460258147894921875 |
[1,1,5,7,25,385,79625,1925,14889875,116491375, 4094715625,32534376875,49558343209375, 2505147019375,118055053288046875, 13604013002689484375,70242756706387890625, 25617946563506171875,1532331197299213611691015625, 167669460258147894921875] |