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 | 1 |
| 2 | 331 |
| 3 | 8401 |
| 4 | 80581 |
| 5 | 464881 |
| 6 | 1950271 |
| 7 | 6568801 |
| 8 | 18837001 |
| 9 | 47763361 |
| 10 | 109889011 |
| 11 | 233669041 |
| 12 | 465542221 |
| 13 | 878077201 |
| 14 | 1580623591 |
| 15 | 2732936641 |
| 16 | 4562284561 |
| 17 | 7384587841 |
| 18 | 11630180251 |
| 19 | 17874821521 |
| 20 | 26876632021 |
| 21 | 39619660081 |
| 22 | 57364832911 |
| 23 | 81709082401 |
| 24 | 114653477401 |
| 25 | 158681234401 |