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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 1657 |
| 3 | 5252041 |
| 4 | 80318704605 |
| 5 | 3662498214110836 |
| 6 | 387950830575476495043 |
| 7 | 81811898713607232898679186 |
| 8 | 30915192640251267259536636853106 |
| 9 | 19388812191991157504565482403825817325 |
| 10 | 19036318336696557481934278608884237849314405 |
[15,1657,5252041,80318704605,3662498214110836, 387950830575476495043,81811898713607232898679186, 30915192640251267259536636853106, 19388812191991157504565482403825817325, 19036318336696557481934278608884237849314405] |