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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 35 |
| 4 | 1365 |
| 5 | 169911 |
| 6 | 67945521 |
| 7 | 89356415775 |
| 8 | 396861704798625 |
| 9 | 6098989894499557055 |
| 10 | 331001552386330913728641 |
| 11 | 64483955378425999076128999167 |
| 12 | 45677647585984911164223317311276545 |
| 13 | 118839819203635450208125966070067352769535 |
| 14 | 1144686912178270649701033287538093722740144666625 |
[1,1,3,35,1365,169911,67945521,89356415775, 396861704798625,6098989894499557055, 331001552386330913728641, 64483955378425999076128999167, 45677647585984911164223317311276545, 118839819203635450208125966070067352769535, 1144686912178270649701033287538093722740144666625] |