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 | 101 |
| 3 | 181 |
| 4 | 18181 |
| 5 | 1008001 |
| 6 | 1180811 |
| 7 | 1880881 |
| 8 | 1881881 |
| 9 | 100111001 |
| 10 | 100888001 |
| 11 | 108101801 |
| 12 | 110111011 |
| 13 | 111010111 |
| 14 | 111181111 |
| 15 | 118818811 |
| 16 | 180101081 |
| 17 | 181111181 |
| 18 | 181888181 |
| 19 | 188010881 |
| 20 | 188888881 |
| 21 | 10008180001 |
| 22 | 10081818001 |