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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 7 |
| 8 | 19 |
| 9 | 37 |
| 10 | 73 |
| 11 | 277 |
| 12 | 1483 |
| 13 | 7857 |
| 14 | 35137 |
| 15 | 178868 |
| 16 | 1263372 |
| 17 | 11050443 |
| 18 | 103009682 |
| 19 | 1012635463 |
[1,7,19,37,73,277,1483,7857,35137,178868,1263372, 11050443,103009682,1012635463] |