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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 4 |
| 6 | 7 |
| 7 | 12 |
| 8 | 22 |
| 9 | 40 |
| 10 | 76 |
| 11 | 142 |
| 12 | 268 |
| 13 | 500 |
| 14 | 944 |
| 15 | 1788 |
| 16 | 3389 |
| 17 | 6444 |
| 18 | 12286 |
| 19 | 23464 |