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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 19 |
| 5 | 239 |
| 6 | 5675 |
| 7 | 249983 |
| 8 | 20404811 |
| 9 | 3112376543 |
| 10 | 898693573515 |
| 11 | 498042936169343 |
| 12 | 536255530818837835 |
| 13 | 1132713758105613132319 |
| 14 | 4726517343060928547800331 |
| 15 | 39145565125819857567685815231 |
| 16 | 645447728030234045716450604490955 |
[1,1,3,19,239,5675,249983,20404811,3112376543, 898693573515,498042936169343,536255530818837835, 1132713758105613132319,4726517343060928547800331, 39145565125819857567685815231, 645447728030234045716450604490955] |