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 | 18 |
| 2 | 81 |
| 3 | 1188 |
| 4 | 1818 |
| 5 | 1881 |
| 6 | 8118 |
| 7 | 8181 |
| 8 | 8811 |
| 9 | 111888 |
| 10 | 118188 |
| 11 | 118818 |
| 12 | 118881 |
| 13 | 181188 |
| 14 | 181818 |
| 15 | 181881 |
| 16 | 188118 |
| 17 | 188181 |
| 18 | 188811 |
| 19 | 811188 |
| 20 | 811818 |
| 21 | 811881 |
| 22 | 818118 |
| 23 | 818181 |
| 24 | 818811 |
| 25 | 881118 |
| 26 | 881181 |
| 27 | 881811 |
| 28 | 888111 |