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 | 5 |
| 2 | 35 |
| 3 | 235 |
| 4 | 335 |
| 5 | 2335 |
| 6 | 3335 |
| 7 | 23335 |
| 8 | 32335 |
| 9 | 33335 |
| 10 | 72335 |
| 11 | 233335 |
| 12 | 323335 |
| 13 | 333335 |
| 14 | 372335 |
| 15 | 572335 |
| 16 | 723335 |
| 17 | 2333335 |
| 18 | 2372335 |
| 19 | 2723335 |
| 20 | 3233335 |
| 21 | 3323335 |
| 22 | 3333335 |
| 23 | 3572335 |
| 24 | 3723335 |
| 25 | 7233335 |
| 26 | 7323335 |
| 27 | 7372335 |
| 28 | 7572335 |
| 29 | 22372335 |
| 30 | 23333335 |