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 | 0 |
| 1 | 35 |
| 2 | 660 |
| 3 | 9767 |
| 4 | 135240 |
| 5 | 1856075 |
| 6 | 25897500 |
| 7 | 371453327 |
| 8 | 5493496080 |
| 9 | 83634563315 |