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 | 6 |
| 2 | 60 |
| 3 | 295 |
| 4 | 1970 |
| 5 | 12547 |
| 6 | 77426 |
| 7 | 490668 |
| 8 | 3078638 |
| 9 | 19343899 |
| 10 | 121656933 |
| 11 | 764438509 |
| 12 | 4805307635 |
| 13 | 30204033317 |
| 14 | 189843766164 |
| 15 | 1193281179607 |
| 16 | 7500358766425 |
| 17 | 47143616101848 |
| 18 | 296322172696548 |
| 19 | 1862536668117625 |
| 20 | 11707004939753233 |