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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 7 |
| 7 | 19 |
| 8 | 37 |
| 9 | 82 |
| 10 | 389 |
| 11 | 2228 |
| 12 | 11375 |
| 13 | 55979 |
| 14 | 368808 |
| 15 | 3167853 |
| 16 | 30342483 |
| 17 | 321262692 |
| 18 | 3912167616 |
| 19 | 56990411793 |
[1,7,19,37,82,389,2228,11375,55979,368808,3167853, 30342483,321262692,3912167616,56990411793] |