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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 57 |
| 3 | 614 |
| 4 | 7158 |
| 5 | 88002 |
| 6 | 1123689 |
| 7 | 14760024 |
| 8 | 198172050 |
| 9 | 2707560544 |
| 10 | 37522666803 |
| 11 | 526190125308 |
| 12 | 7452866846847 |
| 13 | 106465245105972 |
| 14 | 1532129408941797 |
| 15 | 22191180837313808 |
| 16 | 323243244688652943 |
| 17 | 4732225866305323686 |
| 18 | 69591395772704207770 |
| 19 | 1027547992261749954798 |
[1,6,57,614,7158,88002,1123689,14760024,198172050, 2707560544,37522666803,526190125308,7452866846847, 106465245105972,1532129408941797, 22191180837313808,323243244688652943, 4732225866305323686,69591395772704207770, 1027547992261749954798] |