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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 10 |
| 3 | 105 |
| 4 | 1155 |
| 5 | 36465 |
| 6 | 969969 |
| 7 | 37182145 |
| 8 | 1078282205 |
| 9 | 39896441585 |
| 10 | 2668861960765 |
| 11 | 183330286997165 |
| 12 | 14415008697720995 |
| 13 | 775932344695001065 |
| 14 | 45780008337005062835 |
| 15 | 3909612711980232366109 |
| 16 | 261944051702675568529303 |
| 17 | 18598027670889965365580513 |
[2,10,105,1155,36465,969969,37182145,1078282205, 39896441585,2668861960765,183330286997165, 14415008697720995,775932344695001065, 45780008337005062835,3909612711980232366109, 261944051702675568529303, 18598027670889965365580513] |