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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 112 |
| 3 | 31192 |
| 4 | 2432305372 |
| 5 | 14790273553001687902 |
| 6 | 546880479431552932161867875823030372157 |
| 7 | 747695646958212974238278880467821187888728169501525193422768463793490256523387 |