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 | 3 |
| 2 | 11 |
| 3 | 17 |
| 4 | 73 |
| 5 | 101 |
| 6 | 137 |
| 7 | 257 |
| 8 | 353 |
| 9 | 449 |
| 10 | 641 |
| 11 | 1409 |
| 12 | 10753 |
| 13 | 15361 |
| 14 | 19841 |
| 15 | 65537 |
| 16 | 69857 |
| 17 | 453377 |
| 18 | 976193 |
| 19 | 1514497 |
| 20 | 5767169 |
| 21 | 5882353 |
| 22 | 6187457 |
| 23 | 8253953 |
| 24 | 8257537 |
| 25 | 70254593 |
| 26 | 167772161 |
| 27 | 175636481 |
| 28 | 302078977 |
| 29 | 458924033 |
| 30 | 639631361 |
| 31 | 1265011073 |