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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 33 |
| 4 | 329 |
| 5 | 3825 |
| 6 | 57293 |
| 7 | 977581 |
| 8 | 19619645 |
| 9 | 442155529 |
| 10 | 11183272973 |
| 11 | 312134648549 |
| 12 | 9554405887621 |
| 13 | 317670072938621 |
| 14 | 11411690507968361 |
| 15 | 440231352579839965 |
[1,1,5,33,329,3825,57293,977581,19619645, 442155529,11183272973,312134648549,9554405887621, 317670072938621,11411690507968361, 440231352579839965] |