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 | 36 |
| 2 | 1072 |
| 3 | 43800 |
| 4 | 2098720 |
| 5 | 107377488 |
| 6 | 5726689312 |
| 7 | 314146329192 |
| 8 | 17592189191200 |
| 9 | 1000799924679192 |
| 10 | 57646075391404480 |
| 11 | 3353953468337642808 |
| 12 | 196765270128159928000 |
| 13 | 11624286727084886518896 |
| 14 | 690814754065973604816352 |
| 15 | 41264667976180515380660448 |