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) |
|---|---|
| 0 | 3125 |
| 1 | 759375 |
| 2 | 9765625 |
| 3 | 52521875 |
| 4 | 184528125 |
| 5 | 503284375 |
| 6 | 1160290625 |
| 7 | 2373046875 |
| 8 | 4437053125 |
| 9 | 7737809375 |
| 10 | 12762815625 |
| 11 | 20113571875 |
| 12 | 30517578125 |
| 13 | 44840334375 |
| 14 | 64097340625 |
| 15 | 89466096875 |
| 16 | 122298103125 |
| 17 | 164130859375 |
| 18 | 216699865625 |
| 19 | 281950621875 |
| 20 | 362050628125 |
| 21 | 459401384375 |