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 | 49 |
| 1 | 49 |
| 2 | 25281 |
| 3 | 606409 |
| 4 | 37676521 |
| 5 | 1596669889 |
| 6 | 78061422609 |
| 7 | 3612062087761 |
| 8 | 170677159358209 |
| 9 | 8000461380881641 |
| 10 | 376169445225673929 |
| 11 | 17666248458032362369 |
| 12 | 830040053693500377841 |
| 13 | 38992376127586237335409 |
| 14 | 1831844657768331755159361 |
| 15 | 86057114020320867143580169 |