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 | 1234567891 |
| 2 | 1234568059 |
| 3 | 1234569571 |
| 4 | 1234574779 |
| 5 | 1234576171 |
| 6 | 1234579771 |
| 7 | 1234592539 |
| 8 | 1234595779 |
| 9 | 1234609099 |
| 10 | 1234625011 |
| 11 | 1234625971 |
| 12 | 1234634971 |
| 13 | 1234647979 |
| 14 | 1234669651 |
| 15 | 1234692499 |
| 16 | 1234743451 |
| 17 | 1234753651 |
| 18 | 1234769491 |
| 19 | 1234780411 |
| 20 | 1234900819 |
| 21 | 1234948579 |