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 | 1 |
| 2 | 4 |
| 3 | 44 |
| 4 | 916 |
| 5 | 31504 |
| 6 | 1915580 |
| 7 | 208563912 |
| 8 | 41832855136 |
| 9 | 15644344542416 |
| 10 | 10971573350181154 |