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 | 5 |
| 4 | 23 |
| 5 | 73 |
| 6 | 143 |
| 7 | 163 |
| 8 | 235 |
| 9 | 477 |
| 10 | 1238 |
| 11 | 4175 |
| 12 | 4641 |
| 13 | 7820 |
| 14 | 11217 |
| 15 | 25915 |
| 16 | 37643 |
| 17 | 95299 |
| 18 | 576088 |
| 19 | 1203677 |