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 | 2 |
| 2 | 7 |
| 3 | 18 |
| 4 | 49 |
| 5 | 114 |
| 6 | 282 |
| 7 | 624 |
| 8 | 1422 |
| 9 | 3058 |
| 10 | 6597 |
| 11 | 13700 |
| 12 | 28564 |
| 13 | 57698 |
| 14 | 116479 |
| 15 | 230398 |
| 16 | 453698 |
| 17 | 879080 |
| 18 | 1696732 |
| 19 | 3230578 |
| 20 | 6124326 |
| 21 | 11486884 |
| 22 | 21439480 |
| 23 | 39659598 |
| 24 | 73036175 |
| 25 | 133445640 |
| 26 | 242756058 |
| 27 | 438680734 |
| 28 | 789328034 |
| 29 | 1411926186 |
| 30 | 2515574329 |
| 31 | 4458203590 |
| 32 | 7871211452 |
| 33 | 13831782146 |