This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 9 |
| 3 | 49 |
| 4 | 44944 |
| 5 | 5555449 |
| 6 | 545549449 |
| 7 | 59554545444 |
| 8 | 459949959549955449 |
| 9 | 555444595959444995959495549444 |
| 10 | 495555459949459999994555545994544549499995545449 |