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 | 1 |
| 2 | 16 |
| 3 | 384 |
| 4 | 12288 |
| 5 | 491520 |
| 6 | 23592960 |
| 7 | 1321205760 |
| 8 | 84557168640 |
| 9 | 6088116142080 |
| 10 | 487049291366400 |
| 11 | 42860337640243200 |
| 12 | 4114592413463347200 |
| 13 | 427917611000188108800 |
| 14 | 47926772432021068185600 |
| 15 | 5751212691842528182272000 |
| 16 | 736155224555843607330816000 |