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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 1484 |
| 4 | 290247 |
| 5 | 21767466 |
| 6 | 10808297353 |
| 7 | 2375931620966 |
| 8 | 460170137868876 |
| 9 | 86120998813237562 |
| 10 | 20912440756793175381 |
| 11 | 4269789533989878923996 |
| 12 | 903074393101632744082459 |
| 13 | 186843783417066650757163898 |
| 14 | 40434310805094436324334667019 |
| 15 | 8440630895242498970832101406644 |
[0,4,1484,290247,21767466,10808297353, 2375931620966,460170137868876,86120998813237562, 20912440756793175381,4269789533989878923996, 903074393101632744082459, 186843783417066650757163898, 40434310805094436324334667019, 8440630895242498970832101406644] |