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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 82 |
| 4 | 898 |
| 5 | 12018 |
| 6 | 187626 |
| 7 | 3323682 |
| 8 | 65607682 |
| 9 | 1424967394 |
| 10 | 33736908874 |
| 11 | 864372576626 |
| 12 | 23825543471234 |
| 13 | 703074672632018 |
| 14 | 22118247888976170 |
| 15 | 739081808704195650 |
| 16 | 26146116129400483842 |
| 17 | 976382058777174451650 |
| 18 | 38386296866727499728522 |
| 19 | 1584986693941237056394386 |
[1,2,10,82,898,12018,187626,3323682,65607682, 1424967394,33736908874,864372576626, 23825543471234,703074672632018,22118247888976170, 739081808704195650,26146116129400483842, 976382058777174451650,38386296866727499728522, 1584986693941237056394386] |