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 | 7 |
| 2 | 67 |
| 3 | 677 |
| 4 | 787 |
| 5 | 877 |
| 6 | 887 |
| 7 | 7687 |
| 8 | 7867 |
| 9 | 7877 |
| 10 | 8677 |
| 11 | 8867 |
| 12 | 8887 |
| 13 | 66877 |
| 14 | 67777 |
| 15 | 67867 |
| 16 | 68687 |
| 17 | 68767 |
| 18 | 68777 |
| 19 | 76667 |
| 20 | 76777 |
| 21 | 77687 |
| 22 | 77867 |
| 23 | 78787 |
| 24 | 78877 |
| 25 | 78887 |
| 26 | 86677 |
| 27 | 86767 |
| 28 | 87767 |
| 29 | 87877 |
| 30 | 87887 |
| 31 | 88667 |
| 32 | 88867 |
| 33 | 666667 |
| 34 | 667687 |
| 35 | 667867 |
| 36 | 668677 |
| 37 | 668687 |
| 38 | 668867 |
| 39 | 677687 |
| 40 | 677767 |