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 | 5 |
| 4 | 17 |
| 5 | 29 |
| 6 | 113 |
| 7 | 197 |
| 8 | 257 |
| 9 | 449 |
| 10 | 1373 |
| 11 | 3137 |
| 12 | 50177 |
| 13 | 65537 |
| 14 | 114689 |
| 15 | 268913 |
| 16 | 470597 |
| 17 | 614657 |
| 18 | 1075649 |
| 19 | 3294173 |
| 20 | 7340033 |
| 21 | 9834497 |
| 22 | 210827009 |
| 23 | 275365889 |
| 24 | 359661569 |
| 25 | 469762049 |
| 26 | 1129900997 |
| 27 | 1438646273 |
| 28 | 1927561217 |
| 29 | 7909306973 |
| 30 | 52613349377 |