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 | 4 |
| 2 | 36 |
| 3 | 64 |
| 4 | 3364 |
| 5 | 4443664 |
| 6 | 443433464464 |
| 7 | 466363336464 |
| 8 | 43346343434436 |
| 9 | 46443434463364 |
| 10 | 3436643466443664 |
| 11 | 33663346434644644 |
| 12 | 6344433646663343363344 |
| 13 | 444336446434444344644644 |
| 14 | 4333643333666334466333636 |
| 15 | 4464644636363464333646646666664464 |
| 16 | 44444633333463334436443663666646446336 |