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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 36 |
| 4 | 490 |
| 5 | 12729 |
| 6 | 689896 |
| 7 | 70223666 |
| 8 | 13803604854 |
| 9 | 5567490203192 |
| 10 | 4386006155453382 |
| 11 | 6711625359213752077 |
| 12 | 21048250447828058144403 |
| 13 | 131214686495783317936950378 |
| 14 | 1603891839732647136012816743764 |
| 15 | 40296598014204065945778862754895836 |
[1,1,5,36,490,12729,689896,70223666,13803604854, 5567490203192,4386006155453382, 6711625359213752077,21048250447828058144403, 131214686495783317936950378, 1603891839732647136012816743764, 40296598014204065945778862754895836] |