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 | 139 |
| 2 | 193 |
| 3 | 1193 |
| 4 | 1319 |
| 5 | 1399 |
| 6 | 1913 |
| 7 | 1931 |
| 8 | 1933 |
| 9 | 1993 |
| 10 | 3119 |
| 11 | 3191 |
| 12 | 3319 |
| 13 | 3391 |
| 14 | 3911 |
| 15 | 3919 |
| 16 | 3931 |
| 17 | 9133 |
| 18 | 9311 |
| 19 | 9319 |
| 20 | 9391 |
| 21 | 9931 |
| 22 | 11393 |
| 23 | 11399 |
| 24 | 11933 |
| 25 | 11939 |
| 26 | 13339 |
| 27 | 13399 |
| 28 | 13913 |
| 29 | 13931 |
| 30 | 13933 |
| 31 | 13999 |
| 32 | 19139 |
| 33 | 19319 |
| 34 | 19333 |
| 35 | 19391 |
| 36 | 19913 |
| 37 | 19993 |
| 38 | 31139 |