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 | 463 |
| 9 | 499 |
| 10 | 643 |
| 11 | 3343 |
| 12 | 3433 |
| 13 | 3449 |
| 14 | 3463 |
| 15 | 3469 |
| 16 | 3499 |
| 17 | 3643 |
| 18 | 3943 |
| 19 | 4339 |
| 20 | 4349 |
| 21 | 4363 |
| 22 | 4463 |
| 23 | 4493 |
| 24 | 4639 |
| 25 | 4643 |
| 26 | 4649 |
| 27 | 4663 |
| 28 | 4933 |
| 29 | 4943 |
| 30 | 4969 |
| 31 | 4993 |
| 32 | 4999 |
| 33 | 6343 |
| 34 | 6449 |
| 35 | 6469 |
| 36 | 6949 |
| 37 | 9343 |
| 38 | 9349 |
| 39 | 9433 |
| 40 | 9439 |
| 41 | 9463 |
| 42 | 9643 |
| 43 | 9649 |
| 44 | 9949 |
| 45 | 33343 |
| 46 | 33349 |