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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 20 |
| 3 | 19710 |
| 4 | 4295033088 |
| 5 | 298023223876956250 |
| 6 | 10314424798490637108305446464 |
| 7 | 256923577521058878088611477224235622145150 |
| 8 | 6277101735386680763835789423286894578616620063532571951104 |
| 9 | 196627050475552913618075908526912116283103450944214825077052418578026469007467 |
[1,20,19710,4295033088,298023223876956250, 10314424798490637108305446464, 256923577521058878088611477224235622145150, 62771017353866807638357894232868945786166200635325\ 71951104, 19662705047555291361807590852691211628310345094421\ 4825077052418578026469007467] |