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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 4 |
| 7 | 13 |
| 8 | 45 |
| 9 | 200 |
| 10 | 827 |
| 11 | 3807 |
| 12 | 19771 |
| 13 | 133675 |
| 14 | 1067815 |
| 15 | 10084717 |
| 16 | 113366836 |
| 17 | 1442256377 |
[1,4,13,45,200,827,3807,19771,133675,1067815, 10084717,113366836,1442256377] |