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 | 1 |
| 3 | 5 |
| 4 | 338 |
| 5 | 14186 |
| 6 | 526876 |
| 7 | 52658844 |
| 8 | 28076946520 |
| 9 | 18518751047608 |
| 10 | 13637385623943256 |