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 | 2 |
| 3 | 4 |
| 4 | 14 |
| 5 | 44 |
| 6 | 164 |
| 7 | 616 |
| 8 | 2450 |
| 9 | 9908 |
| 10 | 41116 |
| 11 | 173144 |
| 12 | 739884 |
| 13 | 3196344 |
| 14 | 13944200 |
| 15 | 61327312 |
| 16 | 271653254 |
| 17 | 1210772124 |
| 18 | 5426133764 |
| 19 | 24435934568 |
| 20 | 110524288836 |
| 21 | 501864708968 |
| 22 | 2286937749496 |
| 23 | 10454921456688 |
| 24 | 47936304101860 |
| 25 | 220383617137704 |
| 26 | 1015714229399256 |