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 | 7 |
| 3 | 29 |
| 4 | 160 |
| 5 | 1135 |
| 6 | 10529 |
| 7 | 125770 |
| 8 | 1963039 |
| 9 | 39868375 |
| 10 | 1061669314 |
| 11 | 37110747097 |
| 12 | 1708827058427 |