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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 15 |
| 3 | 105 |
| 4 | 15 |
| 5 | 1155 |
| 6 | 455 |
| 7 | 15 |
| 8 | 19635 |
| 9 | 95095 |
| 10 | 2145 |
| 11 | 31395 |
| 12 | 7735 |
| 13 | 2805 |
| 14 | 10818885 |
| 15 | 50115065 |
| 16 | 3315 |
| 17 | 596505 |
| 18 | 80925845 |
| 19 | 3795 |
| 20 | 18515805 |
| 21 | 221847535 |
| 22 | 2211105 |
| 23 | 204920500785 |
| 24 | 1453336885 |
| 25 | 148335 |
| 26 | 95055765 |
| 27 | 287558635 |
| 28 | 27897511785 |
| 29 | 397299047145 |
| 30 | 5613813089885 |
| 31 | 8897205 |
[1,3,15,105,15,1155,455,15,19635,95095,2145,31395, 7735,2805,10818885,50115065,3315,596505,80925845, 3795,18515805,221847535,2211105,204920500785, 1453336885,148335,95055765,287558635,27897511785, 397299047145,5613813089885,8897205] |