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 | 2 |
| 1 | 3 |
| 2 | 10 |
| 3 | 1001 |
| 4 | 1004006004002 |
| 5 | 1020191144865623440455270145683555422808365843606721760320033 |