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 | 18 |
| 3 | 7422 |
| 4 | 13943772 |
| 5 | 122895678174 |
| 6 | 5327856426356284 |
| 7 | 1191337567990711362900 |
| 8 | 1410907091881274891065515756 |