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 | 7 |
| 3 | 28 |
| 4 | 106 |
| 5 | 391 |
| 6 | 992 |
| 7 | 1178 |
| 8 | 7255 |
| 9 | 15975 |
| 10 | 67143 |
| 11 | 333212 |
| 12 | 333212 |
| 13 | 1641257 |