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 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 12 |
| 7 | 29 |
| 8 | 70 |
| 9 | 168 |
| 10 | 402 |
| 11 | 959 |
| 12 | 2284 |
| 13 | 5434 |
| 14 | 12923 |
| 15 | 30727 |
| 16 | 73055 |
| 17 | 173678 |
| 18 | 412830 |