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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 12 |
| 6 | 23 |
| 7 | 46 |
| 8 | 94 |
| 9 | 198 |
| 10 | 424 |
| 11 | 854 |
| 12 | 1859 |
| 13 | 3884 |
| 14 | 8362 |
| 15 | 17837 |
| 16 | 38977 |
| 17 | 84188 |
| 18 | 183167 |
| 19 | 398685 |
| 20 | 874078 |