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 | 787 |
| 3 | 877 |
| 4 | 887 |
| 5 | 7877 |
| 6 | 8087 |
| 7 | 8707 |
| 8 | 8807 |
| 9 | 8887 |
| 10 | 70877 |
| 11 | 78007 |
| 12 | 78707 |
| 13 | 78787 |
| 14 | 78877 |
| 15 | 78887 |
| 16 | 80077 |
| 17 | 80777 |
| 18 | 87877 |
| 19 | 87887 |
| 20 | 88007 |
| 21 | 88807 |
| 22 | 700087 |
| 23 | 700877 |
| 24 | 707887 |
| 25 | 708007 |
| 26 | 777787 |
| 27 | 777877 |
| 28 | 778777 |
| 29 | 780707 |
| 30 | 780877 |
| 31 | 780887 |
| 32 | 787777 |
| 33 | 787807 |
| 34 | 788077 |
| 35 | 788087 |
| 36 | 800077 |