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 | 1 |
| 2 | 6 |
| 3 | 41 |
| 4 | 298 |
| 5 | 2720 |
| 6 | 24688 |
| 7 | 232970 |
| 8 | 2255588 |
| 9 | 22228377 |
| 10 | 220476980 |
| 11 | 2197066826 |