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 | 3 |
| 3 | 10 |
| 4 | 99 |
| 5 | 1376 |
| 6 | 37624 |
| 7 | 1906245 |
| 8 | 180760099 |
| 9 | 31517059634 |
| 10 | 10196460883584 |