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 | 8 |
| 1 | 71 |
| 2 | 701 |
| 3 | 7001 |
| 4 | 70001 |
| 5 | 700001 |
| 6 | 7000001 |
| 7 | 70000001 |
| 8 | 700000001 |
| 9 | 7000000001 |
| 10 | 70000000001 |
| 11 | 700000000001 |
| 12 | 7000000000001 |
| 13 | 70000000000001 |
| 14 | 700000000000001 |
| 15 | 7000000000000001 |
| 16 | 70000000000000001 |
| 17 | 700000000000000001 |
| 18 | 7000000000000000001 |
| 19 | 70000000000000000001 |
| 20 | 700000000000000000001 |