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 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 41 |
| 6 | 87 |
| 7 | 187 |
| 8 | 412 |
| 9 | 937 |
| 10 | 2162 |
| 11 | 5298 |
| 12 | 12354 |
| 13 | 29994 |
| 14 | 74094 |
| 15 | 182994 |
| 16 | 444354 |
| 17 | 1081419 |
| 18 | 2737788 |
| 19 | 6745792 |
| 20 | 16765802 |
| 21 | 41815827 |
| 22 | 105943891 |
| 23 | 261683475 |
| 24 | 655537299 |
| 25 | 1668304275 |