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) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 8 |
| 5 | 14 |
| 6 | 25 |
| 7 | 47 |
| 8 | 86 |
| 9 | 164 |
| 10 | 314 |
| 11 | 603 |
| 12 | 1159 |
| 13 | 2271 |
| 14 | 4456 |
| 15 | 8748 |
| 16 | 17182 |
| 17 | 33761 |
| 18 | 66919 |
| 19 | 132679 |
| 20 | 263087 |