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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 7 |
| 6 | 14 |
| 7 | 37 |
| 8 | 80 |
| 9 | 222 |
| 10 | 544 |
| 11 | 1601 |
| 12 | 4095 |
| 13 | 12416 |
| 14 | 33785 |
| 15 | 105769 |
| 16 | 293747 |
| 17 | 935184 |
| 18 | 2717376 |
| 19 | 8848014 |
| 20 | 26134254 |
| 21 | 86210716 |
| 22 | 262068267 |
| 23 | 877833206 |
| 24 | 2695238060 |
| 25 | 9109101156 |
| 26 | 28619396967 |
| 27 | 97879220771 |
| 28 | 310021153392 |
| 29 | 1067906857449 |
| 30 | 3440140082033 |
| 31 | 11957123227292 |