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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 684 |
| 3 | 350352 |
| 4 | 470444112 |
| 5 | 1293433432704 |
| 6 | 6355554535465920 |
| 7 | 50823027472983319296 |
| 8 | 618002474327361540442368 |
| 9 | 10855431334634213344062394368 |
| 10 | 264600531449039456516679858441216 |
| 11 | 8665832467934840277899318819803484160 |
| 12 | 371368757645100314808527266212241861300224 |
[0,684,350352,470444112,1293433432704, 6355554535465920,50823027472983319296, 618002474327361540442368, 10855431334634213344062394368, 264600531449039456516679858441216, 8665832467934840277899318819803484160, 371368757645100314808527266212241861300224] |