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 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 75 |
| 4 | 625 |
| 5 | 6875 |
| 6 | 65625 |
| 7 | 671875 |
| 8 | 6640625 |
| 9 | 66796875 |
| 10 | 666015625 |
| 11 | 6669921875 |
| 12 | 66650390625 |
| 13 | 666748046875 |
| 14 | 6666259765625 |
| 15 | 66668701171875 |
| 16 | 666656494140625 |
| 17 | 6666717529296875 |
| 18 | 66666412353515625 |
| 19 | 666667938232421875 |