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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 8 |
| 3 | 19 |
| 4 | 45 |
| 5 | 103 |
| 6 | 239 |
| 7 | 545 |
| 8 | 1262 |
| 9 | 2887 |
| 10 | 6700 |
| 11 | 15397 |
| 12 | 35848 |
| 13 | 82757 |
| 14 | 193320 |
| 15 | 448175 |
| 16 | 1050217 |
| 17 | 2443963 |
| 18 | 5743267 |
| 19 | 13410053 |
| 20 | 31593029 |
| 21 | 73984575 |
| 22 | 174689181 |
| 23 | 410141597 |
| 24 | 970289011 |
| 25 | 2283205051 |
| 26 | 5410611863 |
| 27 | 12756825609 |
| 28 | 30274963923 |