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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 6 |
| 5 | 1 |
| 6 | 1 |
| 7 | 30 |
| 8 | 30 |
| 9 | 1 |
| 10 | 1 |
| 11 | 240 |
| 12 | 1200 |
| 13 | 240 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1560 |
| 17 | 62400 |
| 18 | 62400 |
| 19 | 1560 |
| 20 | 1 |
| 21 | 1 |
| 22 | 10920 |
| 23 | 2839200 |
| 24 | 22713600 |
| 25 | 2839200 |
| 26 | 10920 |
| 27 | 1 |
| 28 | 1 |
| 29 | 74256 |
| 30 | 135145920 |
| 31 | 7027587840 |
| 32 | 7027587840 |
| 33 | 135145920 |
| 34 | 74256 |
| 35 | 1 |
| 36 | 1 |
| 37 | 510510 |
| 38 | 6318071760 |
| 39 | 2299778120640 |
[1,1,1,1,6,1,1,30,30,1,1,240,1200,240,1,1,1560, 62400,62400,1560,1,1,10920,2839200,22713600, 2839200,10920,1,1,74256,135145920,7027587840, 7027587840,135145920,74256,1,1,510510,6318071760, 2299778120640] |