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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 24 |
| 5 | 85 |
| 6 | 285 |
| 7 | 1143 |
| 8 | 6268 |
| 9 | 216784 |
| 10 | 1059813 |
| 11 | 6100794 |
| 12 | 226303113 |