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 | 257 |
| 2 | 401 |
| 3 | 577 |
| 4 | 697 |
| 5 | 761 |
| 6 | 1009 |
| 7 | 1129 |
| 8 | 1297 |
| 9 | 1393 |
| 10 | 1489 |
| 11 | 1601 |
| 12 | 1897 |
| 13 | 2081 |
| 14 | 2153 |
| 15 | 2177 |
| 16 | 2329 |
| 17 | 2713 |
| 18 | 2777 |
| 19 | 2857 |
| 20 | 2993 |
| 21 | 3121 |
| 22 | 3137 |
| 23 | 3281 |
| 24 | 3889 |
| 25 | 4001 |