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 | 1 |
| 11 | 6 |
| 12 | 30 |
| 13 | 127 |
| 14 | 506 |
| 15 | 1902 |
| 16 | 6823 |
| 17 | 23673 |
| 18 | 79936 |
| 19 | 264036 |
| 20 | 856772 |
| 21 | 2739525 |
| 22 | 8652707 |
| 23 | 27049259 |
| 24 | 83824636 |
| 25 | 257847515 |
| 26 | 788121922 |
| 27 | 2395786374 |
| 28 | 7248517868 |
| 29 | 21840785100 |
| 30 | 65574504200 |
| 31 | 196266067194 |
| 32 | 585822825763 |
| 33 | 1744384025528 |
| 34 | 5183186173513 |
| 35 | 15372268502463 |
| 36 | 45515472900289 |