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 | 720 |
| 2 | 23400 |
| 3 | 81600 |
| 4 | 235200 |
| 5 | 852600 |
| 6 | 1305360 |
| 7 | 1328400 |
| 8 | 5314320 |
| 9 | 8414280 |
| 10 | 9434880 |
| 11 | 16893240 |
| 12 | 18498480 |
| 13 | 33918720 |
| 14 | 43995600 |
| 15 | 45561600 |
| 16 | 46652760 |
| 17 | 57757440 |
| 18 | 106226640 |
| 19 | 108617760 |
| 20 | 154736400 |
| 21 | 155263680 |
| 22 | 184041000 |
| 23 | 235227600 |
| 24 | 361712400 |
| 25 | 417740400 |
| 26 | 451760400 |
| 27 | 471711240 |