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| n | a(n) |
|---|---|
| 0 | 6 |
| 1 | 12 |
| 2 | 60 |
| 3 | 180 |
| 4 | 2520 |
| 5 | 1008 |
| 6 | 18144 |
| 7 | 18144 |
| 8 | 3991680 |
| 9 | 5987520 |
| 10 | 155675520 |
| 11 | 1089728640 |
| 12 | 26153487360 |
| 13 | 523069747200 |
| 14 | 17784371404800 |
| 15 | 12312257126400 |
| 16 | 935731541606400 |
| 17 | 4678657708032 |
| 18 | 12772735542927360 |
| 19 | 140500090972200960 |
[6,12,60,180,2520,1008,18144,18144,3991680, 5987520,155675520,1089728640,26153487360, 523069747200,17784371404800,12312257126400, 935731541606400,4678657708032,12772735542927360, 140500090972200960] |