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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 0 |
| 7 | 3 |
| 8 | 18 |
| 9 | 6 |
| 10 | 0 |
| 11 | 4 |
| 12 | 84 |
| 13 | 144 |
| 14 | 24 |
| 15 | 0 |
| 16 | 5 |
| 17 | 300 |
| 18 | 1500 |
| 19 | 1200 |
| 20 | 120 |
| 21 | 0 |
| 22 | 6 |
| 23 | 930 |
| 24 | 10800 |
| 25 | 23400 |
| 26 | 10800 |
| 27 | 720 |
| 28 | 0 |
| 29 | 7 |
| 30 | 2646 |
| 31 | 63210 |
| 32 | 294000 |
| 33 | 352800 |
| 34 | 105840 |
| 35 | 5040 |
| 36 | 0 |
| 37 | 8 |
| 38 | 7112 |
| 39 | 324576 |
| 40 | 2857680 |
| 41 | 7056000 |
| 42 | 5362560 |
| 43 | 1128960 |
| 44 | 40320 |
[1,0,1,0,2,2,0,3,18,6,0,4,84,144,24,0,5,300,1500, 1200,120,0,6,930,10800,23400,10800,720,0,7,2646, 63210,294000,352800,105840,5040,0,8,7112,324576, 2857680,7056000,5362560,1128960,40320] |