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 | 676 |
| 2 | 67667076 |
| 3 | 670066667776 |
| 4 | 66007077776676 |
| 5 | 676670006660660066767076066770670707776 |