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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 4 |
| 6 | 12 |
| 7 | 15 |
| 8 | 29 |
| 9 | 58 |
| 10 | 116 |
| 11 | 199 |
| 12 | 403 |
| 13 | 790 |
| 14 | 1509 |
| 15 | 2857 |
| 16 | 5700 |
| 17 | 10941 |
| 18 | 21032 |