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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 2 |
| 10 | 0 |
| 11 | 0 |
| 12 | 3 |
| 13 | 0 |
| 14 | 6 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 20 |
| 19 | 0 |
| 20 | 24 |
| 21 | 0 |
| 22 | 0 |
| 23 | 15 |
| 24 | 40 |
| 25 | 90 |
| 26 | 0 |
| 27 | 120 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
| 31 | 210 |
| 32 | 420 |
| 33 | 504 |
| 34 | 0 |
| 35 | 720 |
| 36 | 0 |
| 37 | 0 |
| 38 | 105 |
| 39 | 1120 |
| 40 | 2520 |
| 41 | 2688 |
| 42 | 3360 |
| 43 | 0 |
| 44 | 5040 |
| 45 | 0 |
| 46 | 0 |
| 47 | 0 |
| 48 | 4760 |
| 49 | 15120 |
| 50 | 27216 |
| 51 | 20160 |
| 52 | 25920 |
| 53 | 0 |
| 54 | 40320 |
| 55 | 0 |
| 56 | 0 |
| 57 | 945 |
| 58 | 25200 |
| 59 | 126000 |
| 60 | 193536 |
| 61 | 226800 |
| 62 | 172800 |
| 63 | 226800 |
| 64 | 0 |
| 65 | 362880 |
[1,0,0,0,0,1,0,0,0,2,0,0,3,0,6,0,0,0,20,0,24,0,0, 15,40,90,0,120,0,0,0,210,420,504,0,720,0,0,105, 1120,2520,2688,3360,0,5040,0,0,0,4760,15120,27216, 20160,25920,0,40320,0,0,945,25200,126000,193536, 226800,172800,226800,0,362880] |