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 | 625 |
| 2 | 1500625 |
| 3 | 9150625 |
| 4 | 17850625 |
| 5 | 37515625 |
| 6 | 52200625 |
| 7 | 73530625 |
| 8 | 81450625 |
| 9 | 174900625 |
| 10 | 442050625 |
| 11 | 577200625 |
| 12 | 1171350625 |
| 13 | 1766100625 |
| 14 | 1838265625 |
| 15 | 2136750625 |
| 16 | 3049800625 |
| 17 | 4931550625 |
| 18 | 7573350625 |
| 19 | 8653650625 |
| 20 | 12594450625 |
| 21 | 15882300625 |
| 22 | 17748900625 |
| 23 | 21970650625 |
| 24 | 24343800625 |