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 | 13 |
| 2 | 31 |
| 3 | 113 |
| 4 | 311 |
| 5 | 389 |
| 6 | 983 |
| 7 | 1031 |
| 8 | 1103 |
| 9 | 1193 |
| 10 | 1301 |
| 11 | 1381 |
| 12 | 1399 |
| 13 | 1439 |
| 14 | 1831 |
| 15 | 1913 |
| 16 | 3011 |
| 17 | 3019 |
| 18 | 3049 |
| 19 | 3089 |
| 20 | 3109 |
| 21 | 3169 |
| 22 | 3191 |
| 23 | 3469 |
| 24 | 3889 |
| 25 | 3911 |
| 26 | 9013 |
| 27 | 9103 |
| 28 | 9341 |
| 29 | 9349 |
| 30 | 9403 |
| 31 | 9439 |
| 32 | 9613 |
| 33 | 9643 |
| 34 | 9803 |
| 35 | 9883 |
| 36 | 9931 |
| 37 | 10039 |
| 38 | 10391 |
| 39 | 10613 |
| 40 | 10639 |
| 41 | 10939 |
| 42 | 10993 |