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 | 8 |
| 2 | 3 |
| 3 | 4 |
| 4 | 1410 |
| 5 | 6 |
| 6 | 154770 |
| 7 | 5246010 |
| 8 | 2894220 |
| 9 | 407874180 |
| 10 | 214580145780 |
| 11 | 9448481062020 |
| 12 | 247236503934420 |
| 13 | 2545206711847800 |
| 14 | 18178612369988250180 |
| 15 | 53792264108455702830 |