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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 5 |
| 2 | 2561 |
| 3 | 687463202817 |
| 4 | 25362915524915764560280676204545 |
| 5 | 2157638231708538191934637891565042782652856782390367212752413267066881 |
[0,5,2561,687463202817, 25362915524915764560280676204545, 21576382317085381919346378915650427826528567823903\ 67212752413267066881] |