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 | 1 |
| 2 | 77 |
| 3 | 7437 |
| 4 | 741037 |
| 5 | 74077037 |
| 6 | 7407437037 |
| 7 | 740741037037 |
| 8 | 74074077037037 |
| 9 | 7407407437037037 |
| 10 | 740740741037037037 |
| 11 | 74074074077037037037 |
| 12 | 7407407407437037037037 |
| 13 | 740740740741037037037037 |