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 | 6 |
| 3 | 36 |
| 4 | 54 |
| 5 | 120 |
| 6 | 2470 |
| 7 | 2640 |
| 8 | 3144 |
| 9 | 3780 |
| 10 | 32640 |
| 11 | 41280 |
| 12 | 52632 |
| 13 | 67184 |
| 14 | 1098176 |
| 15 | 1157904 |
| 16 | 2147450880 |