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 | 0 |
| 3 | 5328 |
| 4 | 49776 |
| 5 | 177040 |
| 6 | 408048 |
| 7 | 744696 |
| 8 | 1183632 |
| 9 | 1723120 |
| 10 | 2362864 |
| 11 | 3102864 |
| 12 | 3943120 |
| 13 | 4883632 |
| 14 | 5924400 |
| 15 | 7065424 |
| 16 | 8306704 |
| 17 | 9648240 |
| 18 | 11090032 |
| 19 | 12632080 |
| 20 | 14274384 |
| 21 | 16016944 |
| 22 | 17859760 |
| 23 | 19802832 |
| 24 | 21846160 |
| 25 | 23989744 |
| 26 | 26233584 |
| 27 | 28577680 |