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 | 7 |
| 2 | 29 |
| 3 | 92 |
| 4 | 288 |
| 5 | 871 |
| 6 | 2577 |
| 7 | 7185 |
| 8 | 19529 |
| 9 | 50216 |
| 10 | 125786 |
| 11 | 298869 |
| 12 | 696808 |
| 13 | 1546941 |
| 14 | 3382516 |
| 15 | 7085876 |
| 16 | 14650326 |
| 17 | 29153966 |
| 18 | 57417292 |
| 19 | 109223923 |
| 20 | 205966389 |
| 21 | 376634957 |
| 22 | 683318087 |
| 23 | 1206075185 |
| 24 | 2114385852 |
| 25 | 3615867548 |