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 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 18 |
| 6 | 322 |
| 7 | 5778 |
| 8 | 505019158607 |
| 9 | 84722519070079276 |
| 10 | 1473646213395791149646646123 |
| 11 | 105249261265075663875711417309855979021650214636 |