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 | 11 |
| 2 | 181 |
| 3 | 811 |
| 4 | 881 |
| 5 | 1181 |
| 6 | 1811 |
| 7 | 8111 |
| 8 | 18181 |
| 9 | 81181 |
| 10 | 88811 |
| 11 | 1111181 |
| 12 | 1181881 |
| 13 | 1881181 |
| 14 | 1881811 |
| 15 | 1881881 |
| 16 | 8118181 |
| 17 | 8181881 |
| 18 | 8188111 |
| 19 | 8188181 |
| 20 | 8818811 |
| 21 | 8881111 |
| 22 | 8881811 |
| 23 | 11818181 |
| 24 | 11881811 |
| 25 | 11888111 |
| 26 | 18111881 |
| 27 | 18118811 |
| 28 | 18181181 |
| 29 | 18811181 |
| 30 | 18888811 |