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 | 5 |
| 3 | 13 |
| 4 | 17 |
| 5 | 61 |
| 6 | 89 |
| 7 | 521 |
| 8 | 2281 |
| 9 | 3217 |
| 10 | 4253 |
| 11 | 9689 |
| 12 | 9941 |
| 13 | 11213 |
| 14 | 19937 |
| 15 | 21701 |
| 16 | 23209 |
| 17 | 44497 |
| 18 | 132049 |
| 19 | 859433 |
| 20 | 1398269 |
| 21 | 2976221 |
| 22 | 3021377 |
| 23 | 6972593 |
| 24 | 13466917 |
| 25 | 30402457 |
| 26 | 32582657 |
| 27 | 42643801 |
| 28 | 43112609 |
| 29 | 57885161 |