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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 51 |
| 4 | 3614 |
| 5 | 991930 |
| 6 | 1051469032 |
| 7 | 4366988803688 |
| 8 | 71895397383029040 |
| 9 | 4719082081411731363408 |
| 10 | 1237678715644664931691596416 |
| 11 | 1297992266840866792981316221144960 |
| 12 | 5444416466164313011147841248189209354496 |
| 13 | 91343356480627224177654291875698256656613808896 |
[1,3,51,3614,991930,1051469032,4366988803688, 71895397383029040,4719082081411731363408, 1237678715644664931691596416, 1297992266840866792981316221144960, 5444416466164313011147841248189209354496, 91343356480627224177654291875698256656613808896] |