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 | 7 |
| 3 | 127 |
| 4 | 1520 |
| 5 | 17041 |
| 6 | 182417 |
| 7 | 1905514 |
| 8 | 19609185 |
| 9 | 199884780 |
| 10 | 2024660098 |
| 11 | 20422230540 |