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 | 101234567897 |
| 2 | 301234567891 |
| 3 | 401234567891 |
| 4 | 401234567897 |
| 5 | 601234567897 |
| 6 | 701234567897 |
| 7 | 801234567893 |
| 8 | 1012345678901 |
| 9 | 1012345678907 |
| 10 | 1012345678961 |
| 11 | 1012345678969 |
| 12 | 1012345678979 |
| 13 | 1012345678997 |
| 14 | 1101234567899 |
| 15 | 1201234567891 |
| 16 | 1501234567891 |
| 17 | 1501234567897 |
| 18 | 1601234567897 |
| 19 | 1601234567899 |