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 | 0 |
| 2 | 4 |
| 3 | 54 |
| 4 | 416 |
| 5 | 2182 |
| 6 | 7884 |
| 7 | 23294 |
| 8 | 56982 |
| 9 | 126310 |
| 10 | 253564 |
| 11 | 477462 |
| 12 | 844524 |
| 13 | 1424316 |