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 | 3 |
| 2 | 43 |
| 3 | 349 |
| 4 | 433 |
| 5 | 439 |
| 6 | 443 |
| 7 | 449 |
| 8 | 499 |
| 9 | 3343 |
| 10 | 3433 |
| 11 | 3449 |
| 12 | 3499 |
| 13 | 3943 |
| 14 | 4339 |
| 15 | 4349 |
| 16 | 4493 |
| 17 | 4933 |
| 18 | 4943 |
| 19 | 4993 |
| 20 | 4999 |
| 21 | 9343 |
| 22 | 9349 |
| 23 | 9433 |
| 24 | 9439 |
| 25 | 9949 |
| 26 | 33343 |
| 27 | 33349 |
| 28 | 33493 |
| 29 | 34439 |
| 30 | 34499 |
| 31 | 34939 |
| 32 | 34949 |
| 33 | 39343 |
| 34 | 39439 |
| 35 | 39443 |
| 36 | 39499 |
| 37 | 43399 |
| 38 | 43499 |
| 39 | 43933 |
| 40 | 43943 |
| 41 | 44449 |
| 42 | 44939 |
| 43 | 49333 |
| 44 | 49339 |
| 45 | 49393 |
| 46 | 49433 |
| 47 | 49499 |
| 48 | 49939 |
| 49 | 49943 |
| 50 | 49993 |