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 | 4 |
| 3 | 12 |
| 4 | 28 |
| 5 | 8 |
| 6 | 124 |
| 7 | 128 |
| 8 | 263 |
| 9 | 9 |
| 10 | 1303 |
| 11 | 519707 |
| 12 | 380 |
| 13 | 3435 |