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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 241 |
| 6 | 199 |
| 7 | 647 |
| 8 | 1117 |
| 9 | 4231 |
| 10 | 8161 |
| 11 | 15361 |
| 12 | 28057 |
| 13 | 67801 |
| 14 | 308509 |
| 15 | 263101 |
| 16 | 515089 |
| 17 | 1525921 |
| 18 | 2103817 |
| 19 | 3376459 |