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 | 1023456789 |
| 2 | 1023456879 |
| 3 | 1023457689 |
| 4 | 1023457869 |
| 5 | 1023458679 |
| 6 | 1023458769 |
| 7 | 1023465789 |
| 8 | 1023465879 |
| 9 | 1023467589 |
| 10 | 1023467859 |
| 11 | 1023468579 |
| 12 | 1023468759 |
| 13 | 1023475689 |
| 14 | 1023475869 |
| 15 | 1023476589 |
| 16 | 1023476859 |
| 17 | 1023478569 |
| 18 | 1023478659 |
| 19 | 1023485679 |
| 20 | 1023485769 |
| 21 | 1023486579 |
| 22 | 1023486759 |