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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 89 |
| 6 | 100 |
| 7 | 133 |
| 8 | 543 |
| 9 | 649 |
| 10 | 869 |
| 11 | 5859 |
| 12 | 9295 |
| 13 | 9957 |
| 14 | 10013 |
| 15 | 11333 |
| 16 | 19799 |
| 17 | 30081 |
| 18 | 38273 |
| 19 | 59653 |
| 20 | 63119 |
| 21 | 63143 |
| 22 | 66423 |
| 23 | 103287 |
| 24 | 124795 |
| 25 | 124821 |
| 26 | 128121 |
| 27 | 128133 |