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 | 90 |
| 3 | 990 |
| 4 | 9870 |
| 5 | 99330 |
| 6 | 930930 |
| 7 | 9699690 |
| 8 | 99981420 |
| 9 | 999068070 |
| 10 | 9592993410 |
| 11 | 99978788910 |
| 12 | 999890501610 |
| 13 | 9814524629910 |
| 14 | 99999887777790 |
| 15 | 999192361827660 |
| 16 | 9999999768941490 |
| 17 | 99992911041433410 |
| 18 | 997799870344687410 |
| 19 | 9999847102571786460 |
| 20 | 99987077573596883670 |
| 21 | 999999011467253427630 |
| 22 | 9999928946485603635510 |