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 | 9 |
| 2 | 11 |
| 3 | 30 |
| 4 | 82 |
| 5 | 6131 |
| 6 | 26735 |
| 7 | 29430 |
| 8 | 76172 |
| 9 | 151439 |
| 10 | 227416 |
| 11 | 771341 |
| 12 | 2712159 |
| 13 | 4490404 |