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 | 7 |
| 4 | 13 |
| 5 | 19 |
| 6 | 43 |
| 7 | 61 |
| 8 | 151 |
| 9 | 257 |
| 10 | 751 |
| 11 | 859 |
| 12 | 1453 |
| 13 | 3767 |
| 14 | 3889 |
| 15 | 8171 |
| 16 | 15959 |
| 17 | 21499 |
| 18 | 22679 |
| 19 | 23297 |
| 20 | 31277 |
| 21 | 43609 |
| 22 | 57037 |
| 23 | 61961 |
| 24 | 103087 |
| 25 | 115931 |
| 26 | 173647 |
| 27 | 215959 |
| 28 | 496073 |