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 | 4 |
| 3 | 14 |
| 4 | 48 |
| 5 | 167 |
| 6 | 593 |
| 7 | 2144 |
| 8 | 7864 |
| 9 | 29171 |
| 10 | 109173 |
| 11 | 411501 |
| 12 | 1560089 |
| 13 | 5943199 |
| 14 | 22732739 |
| 15 | 87253604 |
| 16 | 335897864 |
| 17 | 1296447899 |
| 18 | 5015206349 |
| 19 | 19439895089 |
| 20 | 75487384829 |
| 21 | 293595204239 |
| 22 | 1143532045499 |
| 23 | 4459774977449 |
| 24 | 17413705988873 |