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 | 5 |
| 3 | 7 |
| 4 | 13 |
| 5 | 17 |
| 6 | 19 |
| 7 | 31 |
| 8 | 61 |
| 9 | 89 |
| 10 | 107 |
| 11 | 127 |
| 12 | 521 |
| 13 | 607 |
| 14 | 1279 |
| 15 | 2203 |
| 16 | 2281 |
| 17 | 3217 |
| 18 | 4253 |
| 19 | 4423 |
| 20 | 9689 |
| 21 | 9941 |
| 22 | 11213 |
| 23 | 19937 |
| 24 | 21701 |
| 25 | 23209 |
| 26 | 44497 |
| 27 | 86243 |
| 28 | 110503 |
| 29 | 132049 |
| 30 | 216091 |
| 31 | 756839 |
| 32 | 859433 |
| 33 | 1257787 |
| 34 | 1398269 |
| 35 | 2976221 |
| 36 | 3021377 |
| 37 | 6972593 |
| 38 | 13466917 |