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 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 19 |
| 5 | 31 |
| 6 | 37 |
| 7 | 43 |
| 8 | 61 |
| 9 | 67 |
| 10 | 73 |
| 11 | 79 |
| 12 | 109 |
| 13 | 127 |
| 14 | 139 |
| 15 | 151 |
| 16 | 199 |
| 17 | 277 |
| 18 | 313 |
| 19 | 433 |
| 20 | 457 |
| 21 | 547 |
| 22 | 613 |
| 23 | 619 |
| 24 | 643 |
| 25 | 739 |
| 26 | 967 |