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 | 6 |
| 2 | 66 |
| 3 | 276 |
| 4 | 666 |
| 5 | 7626 |
| 6 | 6666726 |
| 7 | 77666666626 |
| 8 | 2662627722726 |
| 9 | 2777672627676766 |
| 10 | 77772662277672726 |
| 11 | 6622726277766676626 |
| 12 | 672667762262676277666726 |