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) |
|---|---|
| 4 | 1 |
| 5 | 26521 |
| 6 | 761974851 |
| 7 | 21752862899691 |
| 8 | 621305270140974342 |
| 9 | 17745052029585350965782 |
| 10 | 506816536013640476467362442 |
| 11 | 14475186854407942097510802411322 |