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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 4 |
| 11 | 0 |
| 12 | 0 |
| 13 | 10 |
| 14 | 60 |
| 15 | 0 |
| 16 | 1 |
| 17 | 5 |
| 18 | 0 |
| 19 | 0 |
| 20 | 15 |
| 21 | 105 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 36 |
| 26 | 286 |
| 27 | 0 |
| 28 | 0 |
| 29 | 1281 |
| 30 | 12768 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 56 |
| 35 | 504 |
| 36 | 1 |
| 37 | 7 |
| 38 | 2520 |
| 39 | 27720 |
| 40 | 28 |
| 41 | 378 |
| 42 | 1260 |
| 43 | 0 |
| 44 | 0 |
| 45 | 7014 |
| 46 | 84000 |
| 47 | 0 |
| 48 | 0 |
| 49 | 4621 |
| 50 | 83168 |
| 51 | 360360 |
| 52 | 210 |
| 53 | 2346 |
| 54 | 2522880 |
| 55 | 37837800 |
| 56 | 13860 |
| 57 | 180180 |
| 58 | 120 |
| 59 | 1320 |
[1,1,0,0,1,3,0,0,0,1,4,0,0,10,60,0,1,5,0,0,15,105, 0,0,0,36,286,0,0,1281,12768,0,0,0,56,504,1,7,2520, 27720,28,378,1260,0,0,7014,84000,0,0,4621,83168, 360360,210,2346,2522880,37837800,13860,180180,120, 1320] |