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 | 2 |
| 3 | 13 |
| 4 | 493 |
| 5 | 735853 |
| 6 | 1619459312173 |
| 7 | 7875984855578888541679213 |
| 8 | 186030029004437379749629399827828117533654561726893 |