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 | 21 |
| 2 | 364 |
| 3 | 4833 |
| 4 | 58360 |
| 5 | 676941 |
| 6 | 7731364 |
| 7 | 88086873 |
| 8 | 1008580720 |
| 9 | 11652595461 |