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 | 6 |
| 2 | 7 |
| 3 | 66 |
| 4 | 67 |
| 5 | 76 |
| 6 | 77 |
| 7 | 666 |
| 8 | 667 |
| 9 | 676 |
| 10 | 677 |
| 11 | 766 |
| 12 | 767 |
| 13 | 776 |
| 14 | 777 |
| 15 | 6666 |
| 16 | 6667 |
| 17 | 6676 |
| 18 | 6677 |
| 19 | 6766 |
| 20 | 6767 |
| 21 | 6776 |
| 22 | 6777 |
| 23 | 7666 |
| 24 | 7667 |
| 25 | 7676 |
| 26 | 7677 |
| 27 | 7766 |
| 28 | 7767 |
| 29 | 7776 |
| 30 | 7777 |
| 31 | 66666 |
| 32 | 66667 |
| 33 | 66676 |
| 34 | 66677 |
| 35 | 66766 |
| 36 | 66767 |
| 37 | 66776 |
| 38 | 66777 |
| 39 | 67666 |
| 40 | 67667 |