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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 484 |
| 3 | 784 |
| 4 | 7744 |
| 5 | 7478444484 |
| 6 | 8878844747774884 |
| 7 | 84788447488748874848488744487874447844 |
| 8 | 484844884744844787448744774844887478884 |
| 9 | 48784888484784787487448774777744787448847474447478448784 |
[4,484,784,7744,7478444484,8878844747774884, 84788447488748874848488744487874447844, 484844884744844787448744774844887478884, 48784888484784787487448774777744787448847474447478\ 448784] |