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 | 5798663 |
| 2 | 5555564201311 |
| 3 | 5555574497311 |
| 4 | 5555593942711 |
| 5 | 66815976110703 |
| 6 | 69437045907973255623 |