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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 2 |
| 6 | 14 |
| 7 | 8 |
| 8 | 2 |
| 9 | 78 |
| 10 | 36 |
| 11 | 6 |
| 12 | 426 |
| 13 | 234 |
| 14 | 54 |
| 15 | 6 |
| 16 | 3216 |
| 17 | 1512 |
| 18 | 288 |
| 19 | 24 |
| 20 | 24024 |
| 21 | 12864 |
| 22 | 3024 |
| 23 | 384 |
| 24 | 24 |
| 25 | 229080 |
| 26 | 108960 |
| 27 | 22320 |
| 28 | 2400 |
| 29 | 120 |
| 30 | 2170680 |
| 31 | 1145400 |
| 32 | 272400 |
| 33 | 37200 |
| 34 | 3000 |
| 35 | 120 |
| 36 | 25022880 |
| 37 | 11998800 |
| 38 | 2563200 |
| 39 | 309600 |
| 40 | 21600 |
| 41 | 720 |
| 42 | 287250480 |
[1,1,1,1,4,2,14,8,2,78,36,6,426,234,54,6,3216, 1512,288,24,24024,12864,3024,384,24,229080,108960, 22320,2400,120,2170680,1145400,272400,37200,3000, 120,25022880,11998800,2563200,309600,21600,720, 287250480] |