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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 1 |
| 8 | 4 |
| 9 | 6 |
| 10 | 0 |
| 11 | 1 |
| 12 | 10 |
| 13 | 18 |
| 14 | 24 |
| 15 | 0 |
| 16 | 1 |
| 17 | 16 |
| 18 | 72 |
| 19 | 96 |
| 20 | 120 |
| 21 | 0 |
| 22 | 1 |
| 23 | 34 |
| 24 | 168 |
| 25 | 528 |
| 26 | 600 |
| 27 | 720 |
| 28 | 0 |
| 29 | 1 |
| 30 | 52 |
| 31 | 486 |
| 32 | 1632 |
| 33 | 4200 |
| 34 | 4320 |
| 35 | 5040 |
| 36 | 0 |
| 37 | 1 |
| 38 | 90 |
| 39 | 1062 |
| 40 | 6024 |
| 41 | 16200 |
| 42 | 36720 |
| 43 | 35280 |
| 44 | 40320 |
| 45 | 0 |
| 46 | 1 |
| 47 | 152 |
| 48 | 2460 |
| 49 | 16896 |
| 50 | 73200 |
| 51 | 169920 |
| 52 | 352800 |
| 53 | 322560 |
| 54 | 362880 |
[1,0,1,0,1,2,0,1,4,6,0,1,10,18,24,0,1,16,72,96, 120,0,1,34,168,528,600,720,0,1,52,486,1632,4200, 4320,5040,0,1,90,1062,6024,16200,36720,35280, 40320,0,1,152,2460,16896,73200,169920,352800, 322560,362880] |