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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 8 |
| 6 | 8 |
| 7 | 48 |
| 8 | 64 |
| 9 | 192 |
| 10 | 384 |
| 11 | 3840 |
| 12 | 5120 |
| 13 | 61440 |
| 14 | 184320 |
| 15 | 737280 |
| 16 | 1474560 |
| 17 | 23592960 |
| 18 | 47185920 |
| 19 | 849346560 |
| 20 | 2264924160 |
| 21 | 13589544960 |
| 22 | 67947724800 |
| 23 | 1494849945600 |
| 24 | 2989699891200 |
| 25 | 29896998912000 |
| 26 | 179381993472000 |
[1,2,2,8,8,48,64,192,384,3840,5120,61440,184320, 737280,1474560,23592960,47185920,849346560, 2264924160,13589544960,67947724800,1494849945600, 2989699891200,29896998912000,179381993472000] |