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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 133 |
| 3 | 1853 |
| 4 | 26117 |
| 5 | 367389 |
| 6 | 5169809 |
| 7 | 72744121 |
| 8 | 1023588937 |
| 9 | 14402985777 |
| 10 | 202665398173 |
| 11 | 2851718540021 |
| 12 | 40126725007181 |
| 13 | 564625868522949 |
| 14 | 7944888884612393 |
| 15 | 111793070252410993 |
| 16 | 1573047872420021137 |
| 17 | 22134463284128711769 |
| 18 | 311455533850231631029 |
| 19 | 4382511937187348260781 |
[1,9,133,1853,26117,367389,5169809,72744121, 1023588937,14402985777,202665398173,2851718540021, 40126725007181,564625868522949,7944888884612393, 111793070252410993,1573047872420021137, 22134463284128711769,311455533850231631029, 4382511937187348260781] |