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 | 5 |
| 3 | 14 |
| 4 | 41 |
| 5 | 124 |
| 6 | 383 |
| 7 | 1200 |
| 8 | 3799 |
| 9 | 12122 |
| 10 | 38919 |
| 11 | 125578 |
| 12 | 406865 |
| 13 | 1322772 |
| 14 | 4313155 |
| 15 | 14099524 |
| 16 | 46192483 |
| 17 | 151628090 |
| 18 | 498578411 |
| 19 | 1641921014 |
| 20 | 5414619739 |
| 21 | 17878144968 |
| 22 | 59097039545 |
| 23 | 195548471268 |
| 24 | 647665451911 |
| 25 | 2146947613286 |