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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 23 |
| 2 | 1879 |
| 3 | 173891 |
| 4 | 16140983 |
| 5 | 1474050783 |
| 6 | 132279480115 |
| 7 | 11690616534627 |
| 8 | 1020149742404727 |
| 9 | 88094027572412735 |
| 10 | 7541872062618216079 |
| 11 | 641058122723345275763 |
| 12 | 54163773797158984485203 |
| 13 | 4553249681522845632696611 |
| 14 | 381122944171897823109474291 |
[1,23,1879,173891,16140983,1474050783, 132279480115,11690616534627,1020149742404727, 88094027572412735,7541872062618216079, 641058122723345275763,54163773797158984485203, 4553249681522845632696611, 381122944171897823109474291] |