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 | 41520 |
| 3 | 31531872 |
| 4 | 326952560 |
| 5 | 2598744000 |
| 6 | 23087388720 |
| 7 | 1901588877840 |
| 8 | 16838844110112 |
| 9 | 19656251882912 |
| 10 | 154312292512560 |
| 11 | 1386833627452800 |
| 12 | 12276176375647920 |
| 13 | 16416600735609280 |
| 14 | 112539509113431072 |