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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 16 |
| 5 | 35 |
| 6 | 74 |
| 7 | 152 |
| 8 | 313 |
| 9 | 638 |
| 10 | 1287 |
| 11 | 2597 |
| 12 | 5233 |
| 13 | 10512 |
| 14 | 21077 |
| 15 | 42237 |
| 16 | 84565 |
| 17 | 169285 |
| 18 | 338636 |
| 19 | 677457 |