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) |
|---|---|
| 9 | 1 |
| 10 | 2 |
| 11 | 3 |
| 12 | 10 |
| 13 | 29 |
| 14 | 94 |
| 15 | 343 |
| 16 | 1291 |
| 17 | 5206 |
| 18 | 22061 |
| 19 | 96908 |
| 20 | 439837 |
| 21 | 2053916 |
| 22 | 9841412 |
| 23 | 48319944 |
| 24 | 242857491 |
| 25 | 1248629027 |
| 26 | 6563581656 |
| 27 | 35258560001 |
| 28 | 193463945790 |