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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 146 |
| 4 | 9935 |
| 5 | 1161399 |
| 6 | 206499453 |
| 7 | 52093726159 |
| 8 | 17770811461875 |
| 9 | 7903030237890371 |
| 10 | 4450363873663943294 |
| 11 | 3098938855124650814264 |
| 12 | 2616552190721485829559668 |
| 13 | 2635178871851323631797948230 |
| 14 | 3121810359776427044817295874677 |
| 15 | 4298670834657263815567279951080956 |
| 16 | 6809336162211769799756516349665301635 |
| 17 | 12296952422064277377043754761717448273557 |
| 18 | 25116528778581121454413639996325045161219974 |
[1,1,5,146,9935,1161399,206499453,52093726159, 17770811461875,7903030237890371, 4450363873663943294,3098938855124650814264, 2616552190721485829559668, 2635178871851323631797948230, 3121810359776427044817295874677, 4298670834657263815567279951080956, 6809336162211769799756516349665301635, 12296952422064277377043754761717448273557, 25116528778581121454413639996325045161219974] |