| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 2 |
| 9 | 2 |
| 10 | 0 |
| 11 | 0 |
| 12 | 3 |
| 13 | 9 |
| 14 | 6 |
| 15 | 0 |
| 16 | 0 |
| 17 | 6 |
| 18 | 30 |
| 19 | 48 |
| 20 | 24 |
| 21 | 0 |
| 22 | 0 |
| 23 | 9 |
| 24 | 89 |
| 25 | 260 |
| 26 | 300 |
| 27 | 120 |
| 28 | 0 |
| 29 | 0 |
| 30 | 18 |
| 31 | 258 |
| 32 | 1200 |
| 33 | 2400 |
| 34 | 2160 |
| 35 | 720 |
| 36 | 0 |
| 37 | 0 |
| 38 | 30 |
| 39 | 720 |
| 40 | 5100 |
| 41 | 15750 |
| 42 | 23940 |
| 43 | 17640 |
| 44 | 5040 |
| 45 | 0 |
| 46 | 0 |
| 47 | 56 |
| 48 | 2016 |
| 49 | 20720 |
| 50 | 92680 |
| 51 | 211680 |
| 52 | 258720 |
| 53 | 161280 |
| 54 | 40320 |
[1,0,1,0,0,1,0,0,2,2,0,0,3,9,6,0,0,6,30,48,24,0,0, 9,89,260,300,120,0,0,18,258,1200,2400,2160,720,0, 0,30,720,5100,15750,23940,17640,5040,0,0,56,2016, 20720,92680,211680,258720,161280,40320] |