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 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 16 |
| 5 | 48 |
| 6 | 158 |
| 7 | 508 |
| 8 | 1708 |
| 9 | 5787 |
| 10 | 19901 |
| 11 | 68974 |
| 12 | 241240 |
| 13 | 848449 |
| 14 | 3001597 |
| 15 | 10666729 |
| 16 | 38065825 |
| 17 | 136329386 |