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 | 3 |
| 3 | 25 |
| 4 | 49 |
| 5 | 7381 |
| 6 | 86021 |
| 7 | 2436559 |
| 8 | 14274301 |
| 9 | 19093197 |
| 10 | 315404588903 |
| 11 | 9304682830147 |
| 12 | 54801925434709 |
| 13 | 2078178381193813 |
| 14 | 12309312989335019 |
| 15 | 5943339269060627227 |
| 16 | 14063600165435720745359 |
| 17 | 254381445831833111660789 |