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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 2 |
| 4 | 18 |
| 5 | 6 |
| 6 | 114 |
| 7 | 24 |
| 8 | 792 |
| 9 | 120 |
| 10 | 6120 |
| 11 | 720 |
| 12 | 52560 |
| 13 | 5040 |
| 14 | 498960 |
| 15 | 40320 |
| 16 | 5201280 |
| 17 | 362880 |
| 18 | 59149440 |
| 19 | 3628800 |
| 20 | 729388800 |
| 21 | 39916800 |
| 22 | 9699782400 |
| 23 | 479001600 |
| 24 | 138431462400 |
| 25 | 6227020800 |
| 26 | 2110960051200 |
| 27 | 87178291200 |
| 28 | 34261068441600 |
| 29 | 1307674368000 |
| 30 | 589761139968000 |
| 31 | 20922789888000 |
[1,3,2,18,6,114,24,792,120,6120,720,52560,5040, 498960,40320,5201280,362880,59149440,3628800, 729388800,39916800,9699782400,479001600, 138431462400,6227020800,2110960051200,87178291200, 34261068441600,1307674368000,589761139968000, 20922789888000] |