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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 348 |
| 3 | 427 |
| 4 | 20226 |
| 5 | 132409 |
| 6 | 2286535 |
| 7 | 50126162 |
| 8 | 761448901 |
| 9 | 14747885320 |
| 10 | 292184974732 |
| 11 | 5319449303150 |
| 12 | 102312136544858 |
| 13 | 1991770170247881 |
| 14 | 37605783844654553 |
| 15 | 722670947723793458 |
| 16 | 13939476383806855997 |
[21,348,427,20226,132409,2286535,50126162, 761448901,14747885320,292184974732,5319449303150, 102312136544858,1991770170247881, 37605783844654553,722670947723793458, 13939476383806855997] |