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) |
|---|---|
| 2 | 16 |
| 3 | 192 |
| 4 | 2016 |
| 5 | 20160 |
| 6 | 197940 |
| 7 | 1930944 |
| 8 | 18805488 |
| 9 | 183156320 |
| 10 | 1785303660 |
| 11 | 17421627280 |
| 12 | 170214459928 |
| 13 | 1665089608504 |
| 14 | 16307758577692 |
| 15 | 159896665015064 |