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 | 30 |
| 2 | 1255 |
| 3 | 78698 |
| 4 | 5762750 |
| 5 | 455059956 |
| 6 | 37607986470 |
| 7 | 3204942375900 |
| 8 | 279238346962895 |
| 9 | 24739954333817884 |