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 | 3871 |
| 2 | 7777 |
| 3 | 9911 |
| 4 | 9921 |
| 5 | 9922 |
| 6 | 9931 |
| 7 | 9933 |
| 8 | 9941 |
| 9 | 9951 |
| 10 | 9955 |
| 11 | 9961 |
| 12 | 9966 |
| 13 | 9971 |
| 14 | 9977 |
| 15 | 9981 |
| 16 | 9988 |
| 17 | 9999 |
| 18 | 66642 |
| 19 | 66651 |
| 20 | 66661 |
| 21 | 66666 |
| 22 | 66678 |
| 23 | 66681 |
| 24 | 66691 |