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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 22 |
| 4 | 177 |
| 5 | 2606 |
| 6 | 70226 |
| 7 | 3457742 |
| 8 | 311348897 |
| 9 | 51177188350 |
| 10 | 15377065068510 |
| 11 | 8430169458379450 |
| 12 | 8446194335222422950 |
| 13 | 15435904380166258833482 |
| 14 | 51546769958534244310727102 |
| 15 | 313937270864810066000897492222 |
| 16 | 3493348088919874482660174997662017 |
[1,2,5,22,177,2606,70226,3457742,311348897, 51177188350,15377065068510,8430169458379450, 8446194335222422950,15435904380166258833482, 51546769958534244310727102, 313937270864810066000897492222, 3493348088919874482660174997662017] |