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 | 21 |
| 2 | 23 |
| 3 | 27 |
| 4 | 29 |
| 5 | 33 |
| 6 | 39 |
| 7 | 57 |
| 8 | 59 |
| 9 | 69 |
| 10 | 71 |
| 11 | 83 |
| 12 | 87 |
| 13 | 99 |
| 14 | 101 |
| 15 | 107 |