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 | 9 |
| 2 | 561 |
| 3 | 10585 |
| 4 | 1729 |
| 5 | 488881 |
| 6 | 399001 |
| 7 | 2433601 |
| 8 | 1857241 |
| 9 | 6189121 |
| 10 | 549538081 |
| 11 | 50201089 |
| 12 | 14469841 |
| 13 | 86566959361 |
| 14 | 311963097601 |
| 15 | 369838909441 |
| 16 | 31929487861441 |
| 17 | 6389476833601 |
| 18 | 8493512837546881 |
| 19 | 31585234281457921 |
| 20 | 10120721237827201 |
| 21 | 289980482095624321 |
| 22 | 525025434548260801 |
| 23 | 91230634325542321 |