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| n | a(n) |
|---|---|
| 0 | 44 |
| 1 | 4445 |
| 2 | 444546 |
| 3 | 44454647 |
| 4 | 4445464748 |
| 5 | 444546474849 |
| 6 | 44454647484950 |
| 7 | 4445464748495051 |
| 8 | 444546474849505152 |
| 9 | 44454647484950515253 |
| 10 | 4445464748495051525354 |
| 11 | 444546474849505152535455 |
| 12 | 44454647484950515253545556 |
| 13 | 4445464748495051525354555657 |
[44,4445,444546,44454647,4445464748,444546474849, 44454647484950,4445464748495051, 444546474849505152,44454647484950515253, 4445464748495051525354,444546474849505152535455, 44454647484950515253545556, 4445464748495051525354555657] |