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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 12 |
| 2 | 150 |
| 3 | 3528 |
| 4 | 151470 |
| 5 | 11835252 |
| 6 | 1695534750 |
| 7 | 450137811600 |
| 8 | 223862873592150 |
| 9 | 210586842089730540 |
| 10 | 377818996488206253750 |
| 11 | 1301732219036581449975000 |
| 12 | 8661531388920997249932018750 |
| 13 | 111817906864517248017080187253860 |
| 14 | 2811403559627160557559224217577548750 |
[2,12,150,3528,151470,11835252,1695534750, 450137811600,223862873592150,210586842089730540, 377818996488206253750,1301732219036581449975000, 8661531388920997249932018750, 111817906864517248017080187253860, 2811403559627160557559224217577548750] |