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 | 48 |
| 3 | 240 |
| 4 | 672 |
| 5 | 1440 |
| 6 | 2640 |
| 7 | 4368 |
| 8 | 6720 |
| 9 | 9792 |
| 10 | 13680 |
| 11 | 18480 |
| 12 | 24288 |
| 13 | 31200 |
| 14 | 39312 |
| 15 | 48720 |
| 16 | 59520 |
| 17 | 71808 |
| 18 | 85680 |
| 19 | 101232 |
| 20 | 118560 |
| 21 | 137760 |
| 22 | 158928 |
| 23 | 182160 |
| 24 | 207552 |
| 25 | 235200 |
| 26 | 265200 |
| 27 | 297648 |
| 28 | 332640 |
| 29 | 370272 |
| 30 | 410640 |