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 | 7 |
| 3 | 42 |
| 4 | 252 |
| 5 | 1505 |
| 6 | 8946 |
| 7 | 53165 |
| 8 | 315980 |
| 9 | 1878597 |
| 10 | 11171930 |
| 11 | 66456082 |
| 12 | 395399760 |
| 13 | 2352979538 |
| 14 | 14004512886 |