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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 2 |
| 6 | 2 |
| 7 | 6 |
| 8 | 4 |
| 9 | 2 |
| 10 | 22 |
| 11 | 28 |
| 12 | 42 |
| 13 | 72 |
| 14 | 112 |
| 15 | 288 |
| 16 | 420 |
| 17 | 720 |
| 18 | 1568 |
| 19 | 1920 |
| 20 | 3512 |
| 21 | 16560 |
| 22 | 19686 |
| 23 | 16028 |
| 24 | 71280 |
| 25 | 182160 |
| 26 | 184320 |
| 27 | 552960 |
| 28 | 2925648 |
| 29 | 4885160 |
| 30 | 12080640 |
| 31 | 32861900 |
| 32 | 71559680 |
| 33 | 77631750 |
| 34 | 217165824 |
| 35 | 604653336 |
| 36 | 368858880 |
| 37 | 4069377144 |
| 38 | 7919402400 |
| 39 | 17537715360 |
| 40 | 87352688640 |
| 41 | 127718553600 |
[0,0,1,2,2,2,2,6,4,2,22,28,42,72,112,288,420,720, 1568,1920,3512,16560,19686,16028,71280,182160, 184320,552960,2925648,4885160,12080640,32861900, 71559680,77631750,217165824,604653336,368858880, 4069377144,7919402400,17537715360,87352688640, 127718553600] |