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 | 2 |
| 3 | 7 |
| 4 | 20 |
| 5 | 54 |
| 6 | 63 |
| 7 | 114 |
| 8 | 1002 |
| 9 | 1413 |
| 10 | 3007 |
| 11 | 4447 |
| 12 | 35131 |
| 13 | 599185 |
| 14 | 2189416 |
| 15 | 2738842 |
| 16 | 3253273 |
| 17 | 108250112 |