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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 184 |
| 3 | 13360 |
| 4 | 1770880 |
| 5 | 373587200 |
| 6 | 115086003200 |
| 7 | 48784879769600 |
| 8 | 27245388132352000 |
| 9 | 19392357120188416000 |
| 10 | 17137521906875269120000 |
| 11 | 18411376349575875461120000 |
| 12 | 23632217190341837269237760000 |
| 13 | 35718167409293109428879360000000 |
[1,6,184,13360,1770880,373587200,115086003200, 48784879769600,27245388132352000, 19392357120188416000,17137521906875269120000, 18411376349575875461120000, 23632217190341837269237760000, 35718167409293109428879360000000] |