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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 48 |
| 6 | 90 |
| 7 | 12 |
| 8 | 3360 |
| 9 | 18 |
| 10 | 9240 |
| 11 | 15600 |
| 12 | 756 |
| 13 | 31680 |
| 14 | 42840 |
| 15 | 59280 |
| 16 | 1848 |
| 17 | 99360 |
| 18 | 6497400 |
| 19 | 2970 |
| 20 | 185136 |
| 21 | 234360 |
| 22 | 18670080 |
| 23 | 347760 |
| 24 | 421800 |
| 25 | 480480 |
| 26 | 557928 |
| 27 | 55965360 |
| 28 | 70073640 |
| 29 | 857280 |
| 30 | 98960400 |
| 31 | 1157520 |
| 32 | 11880 |
| 33 | 162983520 |
| 34 | 190578024 |
[1,2,4,48,90,12,3360,18,9240,15600,756,31680, 42840,59280,1848,99360,6497400,2970,185136,234360, 18670080,347760,421800,480480,557928,55965360, 70073640,857280,98960400,1157520,11880,162983520, 190578024] |