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| n | a(n) |
|---|---|
| 0 | 12 |
| 1 | 168 |
| 2 | 2784 |
| 3 | 48912 |
| 4 | 874416 |
| 5 | 15709488 |
| 6 | 282620784 |
| 7 | 5086424112 |
| 8 | 91551884016 |
| 9 | 1647915162288 |
| 10 | 29662379171184 |
| 11 | 533922356331312 |
| 12 | 9610600070213616 |
| 13 | 172990789545095088 |
| 14 | 3113834153217961584 |
| 15 | 56049014464954558512 |
| 16 | 1008882258904338303216 |
| 17 | 18159880652953870707888 |
[12,168,2784,48912,874416,15709488,282620784, 5086424112,91551884016,1647915162288, 29662379171184,533922356331312,9610600070213616, 172990789545095088,3113834153217961584, 56049014464954558512,1008882258904338303216, 18159880652953870707888] |