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 | 1304296875 |
| 2 | 1342968750 |
| 3 | 1437890625 |
| 4 | 1824609375 |
| 5 | 9123046875 |
| 6 | 1923046875 |
| 7 | 3104296875 |
| 8 | 3142968750 |
| 9 | 3649218750 |
| 10 | 4137890625 |
| 11 | 4862109375 |
| 12 | 1034296875 |
| 13 | 1269843750 |
| 14 | 6349218750 |
| 15 | 1284609375 |
| 16 | 1293046875 |
| 17 | 1347890625 |
| 18 | 1432968750 |
| 19 | 8124609375 |
| 20 | 1629843750 |
| 21 | 8462109375 |