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 | 12 |
| 1 | 72 |
| 2 | 672 |
| 3 | 6048 |
| 4 | 55488 |
| 5 | 511872 |
| 6 | 4738560 |
| 7 | 43943424 |
| 8 | 407890944 |
| 9 | 3787941888 |
| 10 | 35186122752 |
| 11 | 326885842944 |
| 12 | 3037038034944 |
| 13 | 28217571901440 |
| 14 | 262178452930560 |
| 15 | 2436006721486848 |
| 16 | 22634041833160704 |
| 17 | 210303674768424960 |
| 18 | 1954034324430913536 |
| 19 | 18155901427591938048 |