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 | 0 |
| 2 | 2 |
| 3 | 129 |
| 4 | 2444 |
| 5 | 18700 |
| 6 | 99012 |
| 7 | 376761 |
| 8 | 1216688 |
| 9 | 3297456 |
| 10 | 8158550 |
| 11 | 18080425 |
| 12 | 37847532 |
| 13 | 73399404 |
| 14 | 136971464 |
| 15 | 241561425 |
| 16 | 414517952 |
| 17 | 680856256 |
| 18 | 1095977898 |
| 19 | 1703414961 |
| 20 | 2607286700 |
| 21 | 3877286700 |
| 22 | 5697862412 |
| 23 | 8172733129 |
| 24 | 11613390384 |
| 25 | 16164030000 |
| 26 | 22330294142 |