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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 0 |
| 8 | -6 |
| 9 | 9 |
| 10 | 0 |
| 11 | 0 |
| 12 | 12 |
| 13 | -72 |
| 14 | 64 |
| 15 | 0 |
| 16 | 0 |
| 17 | -20 |
| 18 | 360 |
| 19 | -960 |
| 20 | 625 |
| 21 | 0 |
| 22 | 0 |
| 23 | 30 |
| 24 | -1440 |
| 25 | 8640 |
| 26 | -15000 |
| 27 | 7776 |
| 28 | 0 |
| 29 | 0 |
| 30 | -42 |
| 31 | 5040 |
| 32 | -60480 |
| 33 | 210000 |
| 34 | -272160 |
| 35 | 117649 |
| 36 | 0 |
| 37 | 0 |
| 38 | 56 |
| 39 | -16128 |
| 40 | 362880 |
| 41 | -2240000 |
| 42 | 5443200 |
| 43 | -5647152 |
| 44 | 2097152 |
| 45 | 0 |
| 46 | 0 |
| 47 | -72 |
| 48 | 48384 |
| 49 | -1959552 |
| 50 | 20160000 |
| 51 | -81648000 |
| 52 | 152473104 |
| 53 | -132120576 |
| 54 | 43046721 |
[0,0,1,0,0,2,0,0,-6,9,0,0,12,-72,64,0,0,-20,360, -960,625,0,0,30,-1440,8640,-15000,7776,0,0,-42, 5040,-60480,210000,-272160,117649,0,0,56,-16128, 362880,-2240000,5443200,-5647152,2097152,0,0,-72, 48384,-1959552,20160000,-81648000,152473104, -132120576,43046721] |