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 | 0 |
| 2 | 3 |
| 3 | 236 |
| 4 | 19854 |
| 5 | 3058990 |
| 6 | 1133034160 |
| 7 | 1159826452573 |
| 8 | 3539023342110534 |
| 9 | 33693644340398789900 |
| 10 | 1032075934040317150939325 |