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| n | a(n) |
|---|---|
| 49 | 1 |
| 50 | 50 |
| 51 | 1275 |
| 52 | 22100 |
| 53 | 292825 |
| 54 | 3162510 |
| 55 | 28989675 |
| 56 | 231917400 |
| 57 | 1652411475 |
| 58 | 10648873950 |
| 59 | 62828356305 |
| 60 | 342700125300 |
| 61 | 1742058970275 |
| 62 | 8308281242850 |
| 63 | 37387265592825 |
| 64 | 159518999862720 |
| 65 | 648045936942300 |
| 66 | 2515943049305400 |
[1,50,1275,22100,292825,3162510,28989675, 231917400,1652411475,10648873950,62828356305, 342700125300,1742058970275,8308281242850, 37387265592825,159518999862720,648045936942300, 2515943049305400] |