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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 10 |
| 5 | 57 |
| 6 | 1130 |
| 7 | 128763 |
| 8 | 291003250 |
| 9 | 74940902830737 |
| 10 | 43616092563357042787250 |
| 11 | 6537258709293941644669222566000575763 |
| 12 | 570259361950353096439107826720562074995499493885695588056250 |
[1,2,3,10,57,1130,128763,291003250,74940902830737, 43616092563357042787250, 6537258709293941644669222566000575763, 57025936195035309643910782672056207499549949388569\ 5588056250] |