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 | 0 |
| 2 | 1 |
| 3 | 1520 |
| 4 | 9317 |
| 5 | 31221 |
| 6 | 325374626148 |
| 7 | 535755688021 |
| 8 | 1404720439053 |
| 9 | 3883018238329 |
| 10 | 16166305650060 |