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) |
|---|---|
| 2 | 1 |
| 3 | 28 |
| 4 | 1032 |
| 5 | 52736 |
| 6 | 3646208 |
| 7 | 330545664 |
| 8 | 38188155904 |
| 9 | 5488365862912 |
| 10 | 961530104709120 |
| 11 | 201865242068910080 |
| 12 | 50052995352723193856 |
| 13 | 14476381898608390176768 |
| 14 | 4831399425299156001882112 |