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 | 5 |
| 2 | 87 |
| 3 | 4140 |
| 4 | 433252 |
| 5 | 99827160 |
| 6 | 33093252880 |
| 7 | 18383343930862 |
| 8 | 12954733079950228 |
| 9 | 13465808371086175084 |
| 10 | 16679505315419165886800 |