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 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 20 |
| 7 | 44 |
| 8 | 113 |
| 9 | 329 |
| 10 | 1044 |
| 11 | 3622 |
| 12 | 13544 |
| 13 | 53596 |
| 14 | 223084 |
| 15 | 969158 |