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 | 6 |
| 3 | 36 |
| 4 | 66 |
| 5 | 666 |
| 6 | 333336 |
| 7 | 8868366 |
| 8 | 86638866 |
| 9 | 83838368386 |
| 10 | 636633688636 |
| 11 | 3336366833866 |
| 12 | 3866366838336666 |
| 13 | 63386366836686666 |
| 14 | 636638868363883336386 |
| 15 | 3868888666888666363866 |
| 16 | 66886368686886866888888866 |
| 17 | 683686666688383838366383386 |