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 | 12 |
| 3 | 480 |
| 4 | 4488 |
| 5 | 22278 |
| 6 | 78288 |
| 7 | 220374 |
| 8 | 531594 |
| 9 | 1143648 |
| 10 | 2254440 |
| 11 | 4145244 |
| 12 | 7202190 |
| 13 | 11940444 |
| 14 | 19029300 |
| 15 | 29318754 |
| 16 | 43872402 |
| 17 | 63999528 |
| 18 | 91288794 |
| 19 | 127642164 |
| 20 | 175326336 |
| 21 | 237000816 |
| 22 | 315772032 |