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 | 28 |
| 2 | 820 |
| 3 | 2080 |
| 4 | 80200 |
| 5 | 200028 |
| 6 | 828828 |
| 7 | 8002000 |
| 8 | 800020000 |
| 9 | 8028028828 |
| 10 | 22002880200 |
| 11 | 80000200000 |
| 12 | 208808222028 |
| 13 | 220028220028 |
| 14 | 8000002000000 |
| 15 | 800000020000000 |
| 16 | 2880222880828800 |
| 17 | 22822222802022028 |
| 18 | 80000000200000000 |
| 19 | 8000000002000000000 |
| 20 | 80820888088020828828 |