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 | 10 |
| 2 | 152 |
| 3 | 1858 |
| 4 | 21680 |
| 5 | 253690 |
| 6 | 3023432 |
| 7 | 36785458 |
| 8 | 455700320 |
| 9 | 5725140970 |