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 | 67 |
| 4 | 654 |
| 5 | 7931 |
| 6 | 99401 |
| 7 | 1251135 |
| 8 | 15368035 |
| 9 | 181588299 |
| 10 | 2070553183 |
| 11 | 22980757817 |