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 | 2 |
| 3 | 7 |
| 4 | 71 |
| 5 | 241 |
| 6 | 83 |
| 7 | 157 |
| 8 | 6947 |
| 9 | 4231 |
| 10 | 35509 |
| 11 | 15541 |
| 12 | 199499 |
| 13 | 649147 |