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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 41 |
| 6 | 43 |
| 7 | 61 |
| 8 | 83 |
| 9 | 521 |
| 10 | 541 |
| 11 | 743 |
| 12 | 761 |
| 13 | 941 |
| 14 | 983 |
| 15 | 6521 |
| 16 | 8521 |
| 17 | 8543 |
| 18 | 8741 |
| 19 | 8761 |
| 20 | 76541 |
| 21 | 76543 |
| 22 | 94321 |
| 23 | 98321 |
| 24 | 98543 |