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 | 73 |
| 2 | 733 |
| 3 | 3733 |
| 4 | 7253 |
| 5 | 7523 |
| 6 | 7757 |
| 7 | 33223 |
| 8 | 35323 |
| 9 | 72253 |
| 10 | 72353 |
| 11 | 73327 |
| 12 | 73523 |
| 13 | 73553 |
| 14 | 75223 |
| 15 | 75253 |
| 16 | 77237 |
| 17 | 77323 |
| 18 | 77527 |
| 19 | 77557 |
| 20 | 333323 |
| 21 | 352333 |
| 22 | 355723 |
| 23 | 375223 |
| 24 | 375233 |
| 25 | 375553 |
| 26 | 722333 |
| 27 | 727327 |
| 28 | 733333 |
| 29 | 735733 |
| 30 | 737353 |
| 31 | 737753 |
| 32 | 737773 |
| 33 | 753373 |
| 34 | 753527 |
| 35 | 772273 |
| 36 | 773273 |
| 37 | 775757 |
| 38 | 777353 |
| 39 | 777373 |