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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 2 |
| 3 | 20 |
| 4 | 12 |
| 5 | 3 |
| 6 | 210 |
| 7 | 120 |
| 8 | 30 |
| 9 | 4 |
| 10 | 3024 |
| 11 | 1680 |
| 12 | 420 |
| 13 | 60 |
| 14 | 5 |
| 15 | 55440 |
| 16 | 30240 |
| 17 | 7560 |
| 18 | 1120 |
| 19 | 105 |
| 20 | 6 |
| 21 | 1235520 |
| 22 | 665280 |
| 23 | 166320 |
| 24 | 25200 |
| 25 | 2520 |
| 26 | 168 |
| 27 | 7 |
| 28 | 32432400 |
| 29 | 17297280 |
| 30 | 4324320 |
| 31 | 665280 |
| 32 | 69300 |
| 33 | 5040 |
| 34 | 252 |
| 35 | 8 |
| 36 | 980179200 |
| 37 | 518918400 |
| 38 | 129729600 |
| 39 | 20180160 |
| 40 | 2162160 |
[1,3,2,20,12,3,210,120,30,4,3024,1680,420,60,5, 55440,30240,7560,1120,105,6,1235520,665280,166320, 25200,2520,168,7,32432400,17297280,4324320,665280, 69300,5040,252,8,980179200,518918400,129729600, 20180160,2162160] |