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 | 329400 |
| 2 | 175472640 |
| 3 | 808214400 |
| 4 | 1367566200 |
| 5 | 1928871000 |
| 6 | 3433706640 |
| 7 | 16109533440 |
| 8 | 16916445000 |
| 9 | 17847413640 |
| 10 | 19507068000 |
| 11 | 23163310800 |
| 12 | 24961167000 |
| 13 | 32645743200 |
| 14 | 37263088800 |
| 15 | 39803400000 |
| 16 | 44915270400 |
| 17 | 50238568800 |
| 18 | 66072283200 |
| 19 | 81924990840 |
| 20 | 85368457440 |