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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 30 |
| 6 | 7679 |
| 7 | 271272025838 |
| 8 | 15720888748969530981971252414 |
| 9 | 14069509983003731045582973059193483755803287927789561328867085226 |
| 10 | 1263863542103738914337052461143370675118811161046459223145205641421535664947642082708619717652803582292264797662579828105738049380777191460 |
[1,1,2,4,30,7679,271272025838, 15720888748969530981971252414, 14069509983003731045582973059193483755803287927789\ 561328867085226, 12638635421037389143370524611433706751188111610464\ 59223145205641421535664947642082708619717652803582\ 292264797662579828105738049380777191460] |