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 | 324 |
| 3 | 13122 |
| 4 | 314928 |
| 5 | 5904900 |
| 6 | 95659380 |
| 7 | 1406192886 |
| 8 | 19284931008 |
| 9 | 251048476872 |
| 10 | 3138105960900 |
| 11 | 37971082126890 |
| 12 | 447368385785904 |
| 13 | 5154903899851212 |
| 14 | 58290067175240628 |
| 15 | 648557066098144350 |