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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 19 |
| 2 | 311 |
| 3 | 3671 |
| 4 | 38873 |
| 5 | 386093 |
| 6 | 3681131 |
| 7 | 34136029 |
| 8 | 310248241 |
| 9 | 2777105129 |
| 10 | 24563311309 |
| 11 | 215187847711 |
| 12 | 1870358526653 |
| 13 | 16149760533341 |
| 14 | 138666449011757 |
| 15 | 1184895616861903 |
| 16 | 10082409897709157 |
| 17 | 85476377250109733 |
| 18 | 722285281729443799 |
| 19 | 6085631874569939777 |
[2,19,311,3671,38873,386093,3681131,34136029, 310248241,2777105129,24563311309,215187847711, 1870358526653,16149760533341,138666449011757, 1184895616861903,10082409897709157, 85476377250109733,722285281729443799, 6085631874569939777] |