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 | 4 |
| 2 | 26 |
| 3 | 201 |
| 4 | 1680 |
| 5 | 14902 |
| 6 | 135124 |
| 7 | 1243370 |
| 8 | 11587149 |
| 9 | 108941388 |
| 10 | 1031330156 |
| 11 | 9816605847 |