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 | 7 |
| 2 | 8 |
| 3 | 21 |
| 4 | 60 |
| 5 | 278 |
| 6 | 1520 |
| 7 | 9583 |
| 8 | 61835 |
| 9 | 419705 |
| 10 | 3023007 |
| 11 | 22597508 |