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| n | a(n) |
|---|---|
| 1 | 187 |
| 2 | 506493 |
| 3 | 1496307201 |
| 4 | 4422202024212 |
| 5 | 13069424064243420 |
| 6 | 38625516979536823947 |
| 7 | 114154269785454920027391 |
| 8 | 337372761040287875038964700 |
| 9 | 997075099388051313174129747636 |
[187,506493,1496307201,4422202024212, 13069424064243420,38625516979536823947, 114154269785454920027391, 337372761040287875038964700, 997075099388051313174129747636] |