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) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 15 |
| 5 | 55 |
| 6 | 184 |
| 7 | 648 |
| 8 | 2111 |
| 9 | 6352 |
| 10 | 17337 |
| 11 | 42878 |
| 12 | 102050 |
| 13 | 239756 |
| 14 | 562728 |