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 | 2 |
| 2 | 7 |
| 3 | 28 |
| 4 | 101 |
| 5 | 326 |
| 6 | 967 |
| 7 | 2696 |
| 8 | 7177 |
| 9 | 18442 |
| 10 | 46091 |
| 11 | 112652 |
| 12 | 270349 |
| 13 | 638990 |
| 14 | 1490959 |
| 15 | 3440656 |
| 16 | 7864337 |
| 17 | 17825810 |
| 18 | 40108051 |
| 19 | 89653268 |
| 20 | 199229461 |
| 21 | 440401942 |
| 22 | 968884247 |
| 23 | 2122317848 |
| 24 | 4630511641 |