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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | 2 |
| 6 | 0 |
| 7 | 24 |
| 8 | 6 |
| 9 | 6 |
| 10 | 0 |
| 11 | 192 |
| 12 | 48 |
| 13 | 24 |
| 14 | 24 |
| 15 | 0 |
| 16 | 1920 |
| 17 | 360 |
| 18 | 120 |
| 19 | 120 |
| 20 | 120 |
| 21 | 0 |
| 22 | 23040 |
| 23 | 3600 |
| 24 | 1440 |
| 25 | 720 |
| 26 | 720 |
| 27 | 720 |
| 28 | 0 |
| 29 | 322560 |
| 30 | 40320 |
| 31 | 15120 |
| 32 | 5040 |
| 33 | 5040 |
| 34 | 5040 |
| 35 | 5040 |
| 36 | 0 |
| 37 | 5160960 |
| 38 | 524160 |
| 39 | 161280 |
| 40 | 80640 |
| 41 | 40320 |
| 42 | 40320 |
| 43 | 40320 |
| 44 | 40320 |
| 45 | 0 |
| 46 | 92897280 |
| 47 | 7620480 |
| 48 | 2177280 |
| 49 | 1088640 |
| 50 | 362880 |
| 51 | 362880 |
| 52 | 362880 |
| 53 | 362880 |
| 54 | 362880 |
[1,0,1,0,4,2,0,24,6,6,0,192,48,24,24,0,1920,360, 120,120,120,0,23040,3600,1440,720,720,720,0, 322560,40320,15120,5040,5040,5040,5040,0,5160960, 524160,161280,80640,40320,40320,40320,40320,0, 92897280,7620480,2177280,1088640,362880,362880, 362880,362880,362880] |