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) |
|---|---|
| 8 | 1 |
| 9 | 4 |
| 10 | 18 |
| 11 | 62 |
| 12 | 205 |
| 13 | 624 |
| 14 | 1841 |
| 15 | 5214 |
| 16 | 14448 |
| 17 | 39118 |
| 18 | 104281 |
| 19 | 273900 |
| 20 | 711416 |
| 21 | 1828950 |
| 22 | 4663203 |
| 23 | 11801056 |
| 24 | 29677044 |
| 25 | 74209404 |
| 26 | 184655403 |
| 27 | 457446252 |
| 28 | 1128794669 |
| 29 | 2775534900 |
| 30 | 6802886782 |
| 31 | 16625602146 |
| 32 | 40524317635 |