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) |
|---|---|
| 4 | 2 |
| 5 | 5 |
| 6 | 9 |
| 7 | 15 |
| 8 | 28 |
| 9 | 40 |
| 10 | 60 |
| 11 | 80 |
| 12 | 108 |
| 13 | 143 |
| 14 | 182 |
| 15 | 225 |
| 16 | 280 |
| 17 | 340 |
| 18 | 405 |