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 | 0 |
| 3 | 10 |
| 4 | 151 |
| 5 | 1714 |
| 6 | 17873 |
| 7 | 180953 |
| 8 | 1815841 |
| 9 | 18174211 |