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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 6 |
| 4 | 5 |
| 5 | 2 |
| 6 | 22 |
| 7 | 356 |
| 8 | 108 |
| 9 | 24 |
| 10 | 672 |
| 11 | 25056 |
| 12 | 4680 |
| 13 | 720 |
| 14 | 38160 |
| 15 | 2531520 |
| 16 | 342720 |
| 17 | 40320 |
| 18 | 3467520 |
| 19 | 358444800 |
| 20 | 38102400 |
| 21 | 3628800 |
| 22 | 460857600 |
| 23 | 68388364800 |
| 24 | 5987520000 |
| 25 | 479001600 |
| 26 | 84304281600 |
| 27 | 16979648716800 |
| 28 | 1264085222400 |
| 29 | 87178291200 |
| 30 | 20312541849600 |
[2,6,5,2,22,356,108,24,672,25056,4680,720,38160, 2531520,342720,40320,3467520,358444800,38102400, 3628800,460857600,68388364800,5987520000, 479001600,84304281600,16979648716800, 1264085222400,87178291200,20312541849600] |