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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 2 |
| 6 | 8 |
| 7 | 6 |
| 8 | 16 |
| 9 | 40 |
| 10 | 24 |
| 11 | 16 |
| 12 | 136 |
| 13 | 240 |
| 14 | 120 |
| 15 | 272 |
| 16 | 1232 |
| 17 | 1680 |
| 18 | 720 |
| 19 | 272 |
| 20 | 3968 |
| 21 | 12096 |
| 22 | 13440 |
| 23 | 5040 |
| 24 | 7936 |
| 25 | 56320 |
| 26 | 129024 |
| 27 | 120960 |
| 28 | 40320 |
| 29 | 7936 |
| 30 | 176896 |
| 31 | 814080 |
| 32 | 1491840 |
| 33 | 1209600 |
| 34 | 362880 |
| 35 | 353792 |
| 36 | 3610112 |
| 37 | 12207360 |
| 38 | 18627840 |
| 39 | 13305600 |
| 40 | 3628800 |
[1,1,1,2,2,2,8,6,16,40,24,16,136,240,120,272,1232, 1680,720,272,3968,12096,13440,5040,7936,56320, 129024,120960,40320,7936,176896,814080,1491840, 1209600,362880,353792,3610112,12207360,18627840, 13305600,3628800] |