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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 1716 |
| 3 | 171360 |
| 4 | 19908420 |
| 5 | 2520945504 |
| 6 | 337515951696 |
| 7 | 46988523863424 |
| 8 | 6733620845342820 |
| 9 | 986687339945804640 |
| 10 | 147160710112066546896 |
| 11 | 22266479585813841915264 |
| 12 | 3409510715450350579710096 |
| 13 | 527349554424095532928444800 |
| 14 | 82268694346361937381278049600 |
[1,24,1716,171360,19908420,2520945504, 337515951696,46988523863424,6733620845342820, 986687339945804640,147160710112066546896, 22266479585813841915264,3409510715450350579710096, 527349554424095532928444800, 82268694346361937381278049600] |