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 | 53 |
| 6 | 257 |
| 7 | 677 |
| 8 | 3329 |
| 9 | 13313 |
| 10 | 35153 |
| 11 | 65537 |
| 12 | 2768897 |
| 13 | 13631489 |
| 14 | 2303721473 |
| 15 | 3489660929 |
| 16 | 4942652417 |
| 17 | 11341398017 |
| 18 | 10859007357953 |
| 19 | 1594691292233729 |
| 20 | 31403151600910337 |
| 21 | 310144109150467073 |
| 22 | 578220423796228097 |