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 | 75 |
| 3 | 125 |
| 4 | 5625 |
| 5 | 40625 |
| 6 | 390625 |
| 7 | 7890625 |
| 8 | 62890625 |
| 9 | 712890625 |
| 10 | 3212890625 |
| 11 | 68212890625 |
| 12 | 418212890625 |
| 13 | 4918212890625 |
| 14 | 9918212890625 |
| 15 | 759918212890625 |
| 16 | 1259918212890625 |
| 17 | 6259918212890625 |
| 18 | 756259918212890625 |
| 19 | 7256259918212890625 |
| 20 | 42256259918212890625 |