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 | 97 |
| 3 | 997 |
| 4 | 9967 |
| 5 | 99643 |
| 6 | 998443 |
| 7 | 9986113 |
| 8 | 99979337 |
| 9 | 999962683 |
| 10 | 9987983617 |
| 11 | 99978397283 |
| 12 | 999631686353 |
| 13 | 9997564326947 |
| 14 | 99769267986197 |
| 15 | 999769267986197 |
| 16 | 9957969395462467 |
| 17 | 99957969395462467 |
| 18 | 992429121339693967 |
| 19 | 8963315421273233617 |
| 20 | 86312646216567629137 |