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 | 13 |
| 3 | 31 |
| 4 | 61 |
| 5 | 313 |
| 6 | 613 |
| 7 | 5851 |
| 8 | 7741 |
| 9 | 13963 |
| 10 | 193201 |
| 11 | 344293 |
| 12 | 387433 |