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 | 1 |
| 2 | 91 |
| 3 | 1891 |
| 4 | 8911 |
| 5 | 188191 |
| 6 | 889111 |
| 7 | 899811 |
| 8 | 998991 |
| 9 | 1188111 |
| 10 | 11899881 |
| 11 | 88891111 |
| 12 | 1918188891 |
| 13 | 8888911111 |
| 14 | 9998888991 |
| 15 | 189889118191 |
| 16 | 191819818191 |
| 17 | 199198198891 |
| 18 | 888889111111 |
| 19 | 88888891111111 |
| 20 | 8888888911111111 |
| 21 | 888888889111111111 |
| 22 | 88888888891111111111 |