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 | 6 |
| 3 | 52 |
| 4 | 63 |
| 5 | 222 |
| 6 | 2037 |
| 7 | 6776 |
| 8 | 26896 |
| 9 | 124641 |
| 10 | 220336192 |
| 11 | 222066488 |