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 | 4 |
| 3 | 11 |
| 4 | 22 |
| 5 | 43 |
| 6 | 85 |
| 7 | 171 |
| 8 | 366 |
| 9 | 774 |
| 10 | 1586 |
| 11 | 3136 |
| 12 | 6123 |
| 13 | 12088 |
| 14 | 24283 |
| 15 | 49040 |
| 16 | 99031 |
| 17 | 200444 |
| 18 | 405931 |