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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 0 |
| 4 | 120 |
| 5 | 40 |
| 6 | 0 |
| 7 | 21600 |
| 8 | 37440 |
| 9 | 3680 |
| 10 | 0 |
| 11 | 8553600 |
| 12 | 38966400 |
| 13 | 20592000 |
| 14 | 880000 |
| 15 | 0 |
| 16 | 6329664000 |
| 17 | 57708288000 |
| 18 | 79491456000 |
| 19 | 19269888000 |
| 20 | 435776000 |
| 21 | 0 |
| 22 | 7852204800000 |
| 23 | 123646051584000 |
| 24 | 335872728576000 |
| 25 | 213892766208000 |
| 26 | 28748332800000 |
| 27 | 386949376000 |
| 28 | 0 |
| 29 | 15132769090560000 |
| 30 | 374841224017920000 |
| 31 | 1730103155573760000 |
| 32 | 2169194182594560000 |
| 33 | 774705298498560000 |
| 34 | 64544356546560000 |
| 35 | 560034421760000 |
[1,0,2,0,120,40,0,21600,37440,3680,0,8553600, 38966400,20592000,880000,0,6329664000,57708288000, 79491456000,19269888000,435776000,0,7852204800000, 123646051584000,335872728576000,213892766208000, 28748332800000,386949376000,0,15132769090560000, 374841224017920000,1730103155573760000, 2169194182594560000,774705298498560000, 64544356546560000,560034421760000] |