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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 0 |
| 5 | 8 |
| 6 | 2 |
| 7 | 36 |
| 8 | 16 |
| 9 | 24 |
| 10 | 8 |
| 11 | 140 |
| 12 | 0 |
| 13 | 936 |
| 14 | 312 |
| 15 | 416 |
| 16 | 96 |
| 17 | 3648 |
| 18 | 576 |
| 19 | 30240 |
| 20 | 4608 |
| 21 | 9792 |
| 22 | 3360 |
| 23 | 103488 |
| 24 | 10368 |
| 25 | 72960 |
| 26 | 13752 |
| 27 | 22896 |
| 28 | 1296 |
| 29 | 134400 |
| 30 | 23424 |
| 31 | 2671200 |
| 32 | 556800 |
| 33 | 794400 |
| 34 | 202752 |
| 35 | 145152 |
| 36 | 7488 |
| 37 | 3594240 |
| 38 | 1013472 |
| 39 | 1202688 |
| 40 | 102912 |
| 41 | 17606400 |
[1,1,2,0,8,2,36,16,24,8,140,0,936,312,416,96,3648, 576,30240,4608,9792,3360,103488,10368,72960,13752, 22896,1296,134400,23424,2671200,556800,794400, 202752,145152,7488,3594240,1013472,1202688,102912, 17606400] |