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 | 4 |
| 3 | 41 |
| 4 | 846 |
| 5 | 27000 |
| 6 | 1268728 |
| 7 | 76714325 |
| 8 | 5732148226 |
| 9 | 507120480166 |
| 10 | 51689513352516 |