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 | 5 |
| 3 | 19 |
| 4 | 71 |
| 5 | 601 |
| 6 | 1997 |
| 7 | 2579 |
| 8 | 3691 |
| 9 | 75533 |
| 10 | 167543 |
| 11 | 175649 |