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 | 89 |
| 2 | 409 |
| 3 | 449 |
| 4 | 499 |
| 5 | 809 |
| 6 | 4049 |
| 7 | 4099 |
| 8 | 4409 |
| 9 | 4649 |
| 10 | 4889 |
| 11 | 4909 |
| 12 | 4969 |
| 13 | 4999 |
| 14 | 6089 |
| 15 | 6449 |
| 16 | 6469 |
| 17 | 6689 |
| 18 | 6869 |
| 19 | 6899 |
| 20 | 6949 |
| 21 | 8009 |
| 22 | 8069 |
| 23 | 8089 |
| 24 | 8609 |
| 25 | 8669 |
| 26 | 8689 |
| 27 | 8699 |
| 28 | 8849 |
| 29 | 8969 |
| 30 | 8999 |
| 31 | 9049 |
| 32 | 9649 |
| 33 | 9689 |
| 34 | 9949 |
| 35 | 40009 |
| 36 | 40099 |
| 37 | 40499 |
| 38 | 40609 |
| 39 | 40699 |
| 40 | 40849 |
| 41 | 40949 |