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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1897 |
| 3 | 33933 |
| 4 | 849983 |
| 5 | 20337282 |
| 6 | 453231742 |
| 7 | 10730354337 |
| 8 | 250993766141 |
| 9 | 5814109226770 |
| 10 | 135951473715467 |
| 11 | 3171429468785555 |
| 12 | 73885652459293138 |
| 13 | 1723840754084789977 |
| 14 | 40201645117010706612 |
| 15 | 937384798388530881164 |
[81,1897,33933,849983,20337282,453231742, 10730354337,250993766141,5814109226770, 135951473715467,3171429468785555, 73885652459293138,1723840754084789977, 40201645117010706612,937384798388530881164] |