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) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 1296 |
| 3 | 6912 |
| 4 | 6480000 |
| 5 | 288000 |
| 6 | 6223392000 |
| 7 | 14224896000 |
| 8 | 1440270720000 |
| 9 | 64012032000 |
| 10 | 562320096307200 |
| 11 | 511200087552000 |
| 12 | 255506749760021760000 |
| 13 | 1455878916011520000 |
| 14 | 673863955411046400 |
| 15 | 17969705477627904000 |