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 | 4 |
| 3 | 26 |
| 4 | 131 |
| 5 | 276 |
| 6 | 881 |
| 7 | 3431 |
| 8 | 81346 |
| 9 | 81619 |
| 10 | 129119 |
| 11 | 132954 |
| 12 | 1292931424 |