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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 23 |
| 6 | 46 |
| 7 | 73 |
| 8 | 206 |
| 9 | 491 |
| 10 | 999 |
| 11 | 2030 |
| 12 | 4080 |
| 13 | 8151 |