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 | 3 |
| 2 | 17 |
| 3 | 161 |
| 4 | 8749 |
| 5 | 19601 |
| 6 | 246401 |
| 7 | 672281 |
| 8 | 23718421 |
| 9 | 10285001 |
| 10 | 354365441 |
| 11 | 3222617399 |
| 12 | 9447152318 |
| 13 | 127855050751 |
| 14 | 842277599279 |
| 15 | 2218993446251 |
| 16 | 2907159732049 |
| 17 | 41257182408961 |
| 18 | 63774701665793 |
| 19 | 25640240468751 |
| 20 | 238178082107393 |
| 21 | 4573663454608289 |
| 22 | 19182937474703818751 |
| 23 | 34903240221563713 |
| 24 | 332110803172167361 |
| 25 | 99913980938200001 |