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 | 987654321007 |
| 2 | 1098765432101 |
| 3 | 3598765432109 |
| 4 | 9798765432101 |
| 5 | 9876543210463 |
| 6 | 9876543210733 |
| 7 | 9876543210847 |
| 8 | 9987654321077 |
| 9 | 9987654321097 |
| 10 | 10987654321001 |
| 11 | 10987654321097 |
| 12 | 11987654321081 |
| 13 | 12987654321011 |
| 14 | 14987654321053 |
| 15 | 18898765432109 |
| 16 | 19876543210187 |
| 17 | 19876543210607 |
| 18 | 19876543210691 |