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 | 122449 |
| 2 | 489796 |
| 3 | 122448979591836734693877551020408163265306122449 |
| 4 | 489795918367346938775510204081632653061224489796 |