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 | 52 |
| 3 | 43833 |
| 4 | 149670844 |
| 5 | 1346634725665 |
| 6 | 25571928251231076 |
| 7 | 893591647147188285577 |
| 8 | 52327970757667659912764908 |
| 9 | 4796836032234830356783078467969 |