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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6720 |
| 2 | 908107200 |
| 3 | 219880332672000 |
| 4 | 68988797394917400000 |
| 5 | 25074900986572531781406720 |
| 6 | 10020866714102104004815416345600 |
| 7 | 4279294191955384309331984972451840000 |
| 8 | 1919148628519512871195133269395274930200000 |
| 9 | 893712691793039631373861043180453746548518400000 |
| 10 | 428797735527347361531676179775963980114734257613107200 |
[1,6720,908107200,219880332672000, 68988797394917400000,25074900986572531781406720, 10020866714102104004815416345600, 4279294191955384309331984972451840000, 1919148628519512871195133269395274930200000, 893712691793039631373861043180453746548518400000, 42879773552734736153167617977596398011473425761310\ 7200] |