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 | 24 |
| 3 | 1344 |
| 4 | 7056 |
| 5 | 19568 |
| 6 | 39348 |
| 7 | 66360 |
| 8 | 100380 |
| 9 | 141408 |
| 10 | 189444 |
| 11 | 244488 |
| 12 | 306540 |
| 13 | 375600 |
| 14 | 451668 |
| 15 | 534744 |
| 16 | 624828 |
| 17 | 721920 |
| 18 | 826020 |
| 19 | 937128 |
| 20 | 1055244 |
| 21 | 1180368 |
| 22 | 1312500 |
| 23 | 1451640 |
| 24 | 1597788 |
| 25 | 1750944 |
| 26 | 1911108 |
| 27 | 2078280 |
| 28 | 2252460 |
| 29 | 2433648 |
| 30 | 2621844 |