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 | 619 |
| 5 | 16091 |
| 6 | 18181 |
| 7 | 19861 |
| 8 | 61819 |
| 9 | 116911 |
| 10 | 119611 |
| 11 | 160091 |
| 12 | 169691 |
| 13 | 191161 |
| 14 | 196961 |
| 15 | 686989 |
| 16 | 688889 |
| 17 | 1008001 |
| 18 | 1068901 |
| 19 | 1160911 |
| 20 | 1180811 |
| 21 | 1190611 |
| 22 | 1191611 |
| 23 | 1681891 |
| 24 | 1690691 |
| 25 | 1880881 |
| 26 | 1881881 |
| 27 | 1898681 |
| 28 | 1908061 |
| 29 | 1960961 |
| 30 | 1990661 |
| 31 | 6081809 |
| 32 | 6100019 |
| 33 | 6108019 |