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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 20 |
| 3 | 295 |
| 4 | 3828 |
| 5 | 46557 |
| 6 | 546286 |
| 7 | 6279393 |
| 8 | 71316632 |
| 9 | 804230945 |
| 10 | 9031118936 |
| 11 | 101161197895 |
| 12 | 1131456031256 |
| 13 | 12643706576681 |
| 14 | 141214773950750 |
| 15 | 1576695869980497 |
| 16 | 17600838146781308 |
| 17 | 196457931325141165 |
[1,20,295,3828,46557,546286,6279393,71316632, 804230945,9031118936,101161197895,1131456031256, 12643706576681,141214773950750,1576695869980497, 17600838146781308,196457931325141165] |