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 | 0 |
| 4 | 0 |
| 5 | 100 |
| 6 | 576 |
| 7 | 2156 |
| 8 | 7168 |
| 9 | 17496 |
| 10 | 41600 |
| 11 | 82280 |
| 12 | 161280 |
| 13 | 280540 |
| 14 | 486080 |
| 15 | 774900 |
| 16 | 1232896 |
| 17 | 1844976 |
| 18 | 2757888 |
| 19 | 3933456 |
| 20 | 5606400 |
| 21 | 7699860 |
| 22 | 10570560 |
| 23 | 14081980 |
| 24 | 18754560 |
| 25 | 24365000 |
| 26 | 31647616 |
| 27 | 40258296 |
| 28 | 51204608 |
| 29 | 63979916 |