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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 15 |
| 6 | 3 |
| 7 | 24 |
| 8 | 140 |
| 9 | 48 |
| 10 | 4 |
| 11 | 120 |
| 12 | 1750 |
| 13 | 775 |
| 14 | 110 |
| 15 | 5 |
| 16 | 720 |
| 17 | 28644 |
| 18 | 14550 |
| 19 | 2670 |
| 20 | 210 |
| 21 | 6 |
| 22 | 5040 |
| 23 | 588588 |
| 24 | 323008 |
| 25 | 68775 |
| 26 | 7105 |
| 27 | 357 |
| 28 | 7 |
| 29 | 40320 |
| 30 | 14592864 |
| 31 | 8388800 |
| 32 | 1962632 |
| 33 | 239120 |
| 34 | 16016 |
| 35 | 560 |
| 36 | 8 |
| 37 | 362880 |
| 38 | 423227376 |
| 39 | 250742700 |
| 40 | 62531532 |
| 41 | 8502921 |
| 42 | 680904 |
| 43 | 32130 |
| 44 | 828 |
| 45 | 9 |
[1,2,2,6,15,3,24,140,48,4,120,1750,775,110,5,720, 28644,14550,2670,210,6,5040,588588,323008,68775, 7105,357,7,40320,14592864,8388800,1962632,239120, 16016,560,8,362880,423227376,250742700,62531532, 8502921,680904,32130,828,9] |