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 | 140001089 |
| 2 | 1401099989 |
| 3 | 14000109989 |
| 4 | 140108910989 |
| 5 | 1401089109989 |
| 6 | 14001089001089 |
| 7 | 14010890109989 |
| 8 | 140000010891089 |
| 9 | 140000109999989 |
| 10 | 140010890010989 |
| 11 | 140010989001089 |
| 12 | 140010989109989 |
| 13 | 140108900109989 |