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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 480 |
| 3 | 2688 |
| 4 | 92160 |
| 5 | 4055040 |
| 6 | 805109760 |
| 7 | 148635648 |
| 8 | 2021444812800 |
| 9 | 9037047398400 |
| 10 | 41855798476800 |
| 11 | 85571854663680 |
| 12 | 1218840851644416000 |
| 13 | 131634811977596928000 |
| 14 | 30539276378802487296000 |
| 15 | 26116346696355230515200 |
| 16 | 72745993870031978496000 |
| 17 | 8332722934203662991360000 |
[1,12,480,2688,92160,4055040,805109760,148635648, 2021444812800,9037047398400,41855798476800, 85571854663680,1218840851644416000, 131634811977596928000,30539276378802487296000, 26116346696355230515200,72745993870031978496000, 8332722934203662991360000] |