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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 94 |
| 4 | 856 |
| 5 | 2995 |
| 6 | 56902 |
| 7 | 413893 |
| 8 | 1527982 |
| 9 | 47859601 |
| 10 | 702710533 |
| 11 | 1373798194 |
| 12 | 8537856169 |
| 13 | 38139946795 |
| 14 | 565726979662 |
| 15 | 4367588800693 |
| 16 | 15840612137503 |
| 17 | 125269482488011 |
| 18 | 770614773688678 |
| 19 | 6470285143034935 |
| 20 | 54544210069919254 |
[1,7,94,856,2995,56902,413893,1527982,47859601, 702710533,1373798194,8537856169,38139946795, 565726979662,4367588800693,15840612137503, 125269482488011,770614773688678,6470285143034935, 54544210069919254] |