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 | 64 |
| 3 | 1152 |
| 4 | 12288 |
| 5 | 102400 |
| 6 | 737280 |
| 7 | 4816896 |
| 8 | 29360128 |
| 9 | 169869312 |
| 10 | 943718400 |
| 11 | 5075107840 |
| 12 | 26575110144 |
| 13 | 136096776192 |
| 14 | 683973541888 |
| 15 | 3382286745600 |
| 16 | 16492674416640 |
| 17 | 79439715106816 |
| 18 | 378506877861888 |
| 19 | 1786156639322112 |