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 | 3 |
| 2 | 55 |
| 3 | 595 |
| 4 | 5995 |
| 5 | 33533955 |
| 6 | 5939355555 |
| 7 | 9993335593335 |
| 8 | 535555935535935 |
| 9 | 599593353353393939939955 |
| 10 | 595993553593935939553359535599399555 |