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 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 8 |
| 5 | 26 |
| 6 | 60 |
| 7 | 135 |
| 8 | 323 |
| 9 | 791 |
| 10 | 1840 |
| 11 | 4216 |
| 12 | 9967 |
| 13 | 23070 |
| 14 | 54356 |
| 15 | 129125 |