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 | 20 |
| 3 | 35 |
| 4 | 143 |
| 5 | 208 |
| 6 | 2623 |
| 7 | 5183 |
| 8 | 27796 |
| 9 | 11177983 |
| 10 | 69677008 |
| 11 | 920158207 |
| 12 | 1099508482048 |