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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 11 |
| 7 | 113 |
| 8 | 1099 |
| 9 | 11060 |
| 10 | 118484 |
| 11 | 1366134 |
| 12 | 16970322 |
| 13 | 226574211 |
| 14 | 3240161105 |
| 15 | 49453685911 |
| 16 | 802790789101 |
| 17 | 13815657556958 |
| 18 | 251309386257874 |
| 19 | 4818622686395380 |
| 20 | 97145520138758844 |
| 21 | 2054507019515346789 |
| 22 | 45484006970415223287 |
| 23 | 1052036480881734378541 |
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