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 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 24 |
| 7 | 45 |
| 8 | 84 |
| 9 | 157 |
| 10 | 293 |
| 11 | 548 |
| 12 | 1025 |
| 13 | 1917 |
| 14 | 3585 |
| 15 | 6705 |
| 16 | 12542 |
| 17 | 23460 |
| 18 | 43882 |
| 19 | 82081 |
| 20 | 153535 |
| 21 | 287193 |
| 22 | 537205 |
| 23 | 1004861 |
| 24 | 1879631 |
| 25 | 3515926 |
| 26 | 6576683 |
| 27 | 12301953 |
| 28 | 23011306 |
| 29 | 43043596 |
| 30 | 80514826 |
| 31 | 150606312 |