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 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 22 |
| 4 | 87 |
| 5 | 364 |
| 6 | 1574 |
| 7 | 6986 |
| 8 | 31581 |
| 9 | 144880 |
| 10 | 672390 |
| 11 | 3150362 |
| 12 | 14877317 |
| 13 | 70726936 |
| 14 | 338158676 |