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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 82 |
| 4 | 866 |
| 5 | 10482 |
| 6 | 138698 |
| 7 | 1957346 |
| 8 | 29024642 |
| 9 | 448005922 |
| 10 | 7153738058 |
| 11 | 117681081522 |
| 12 | 1988787934818 |
| 13 | 34465473701522 |
| 14 | 611806834645642 |
| 15 | 11118408274591938 |
| 16 | 206835953956603394 |
| 17 | 3939803761941599042 |
| 18 | 76880490874588995978 |
| 19 | 1538019374456939130386 |
[1,2,10,82,866,10482,138698,1957346,29024642, 448005922,7153738058,117681081522,1988787934818, 34465473701522,611806834645642,11118408274591938, 206835953956603394,3939803761941599042, 76880490874588995978,1538019374456939130386] |