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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 11 |
| 6 | 23 |
| 7 | 49 |
| 8 | 105 |
| 9 | 225 |
| 10 | 485 |
| 11 | 1045 |
| 12 | 2252 |
| 13 | 4852 |
| 14 | 10452 |
| 15 | 22517 |
| 16 | 48510 |
| 17 | 104508 |
| 18 | 225153 |
| 19 | 485075 |
| 20 | 1045058 |
| 21 | 2251505 |
| 22 | 4850716 |
| 23 | 10450546 |
| 24 | 22515012 |
| 25 | 48507117 |
| 26 | 104505409 |
| 27 | 225150073 |
| 28 | 485071123 |
| 29 | 1045054049 |
| 30 | 2251500692 |