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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 4 |
| 2 | 302 |
| 3 | 8104 |
| 4 | 1189562 |
| 5 | 113466604 |
| 6 | 28069843622 |
| 7 | 6004208983504 |
| 8 | 2285772143562482 |
| 9 | 867405503682334804 |
| 10 | 478060568033873866142 |
| 11 | 280896639757518649936504 |
| 12 | 213833919524790465586194602 |
[2,4,302,8104,1189562,113466604,28069843622, 6004208983504,2285772143562482,867405503682334804, 478060568033873866142,280896639757518649936504, 213833919524790465586194602] |