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 | 52 |
| 3 | 1335 |
| 4 | 115975 |
| 5 | 20880505 |
| 6 | 6423127757 |
| 7 | 3030359756694 |
| 8 | 2043836470040286 |