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| n | a(n) |
|---|---|
| 1 | 51 |
| 2 | 1952 |
| 3 | 49503 |
| 4 | 1069536 |
| 5 | 21121532 |
| 6 | 387542112 |
| 7 | 6594175430 |
| 8 | 103536313036 |
| 9 | 1496475492375 |
| 10 | 19928249063688 |
| 11 | 245280439959902 |
| 12 | 2802425055340520 |
| 13 | 29863427285241827 |
| 14 | 298206737876251916 |
| 15 | 2802780797553511873 |
[51,1952,49503,1069536,21121532,387542112, 6594175430,103536313036,1496475492375, 19928249063688,245280439959902,2802425055340520, 29863427285241827,298206737876251916, 2802780797553511873] |