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 | 353 |
| 2 | 131713 |
| 3 | 171917 |
| 4 | 192319 |
| 5 | 293129 |
| 6 | 374137 |
| 7 | 434743 |
| 8 | 596159 |
| 9 | 677167 |
| 10 | 139149139 |
| 11 | 163167163 |
| 12 | 179181179 |
| 13 | 223227223 |
| 14 | 229233229 |
| 15 | 269271269 |
| 16 | 281283281 |
| 17 | 347349347 |
| 18 | 379383379 |
| 19 | 547557547 |
| 20 | 683691683 |
| 21 | 761769761 |
| 22 | 857859857 |
| 23 | 863877863 |
| 24 | 102110311021 |
| 25 | 103910491039 |
| 26 | 108710911087 |
| 27 | 109110931091 |
| 28 | 109310971093 |