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 | 27 |
| 4 | 376 |
| 5 | 7430 |
| 6 | 233340 |
| 7 | 10013094 |
| 8 | 618332080 |
| 9 | 70437029472 |
| 10 | 39048511536720 |