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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 17 |
| 5 | 38 |
| 6 | 87 |
| 7 | 200 |
| 8 | 457 |
| 9 | 1034 |
| 10 | 2315 |
| 11 | 5132 |
| 12 | 11277 |
| 13 | 24590 |
| 14 | 53263 |
| 15 | 114704 |
| 16 | 245777 |
| 17 | 524306 |
| 18 | 1114131 |
| 19 | 2359316 |
| 20 | 4980757 |
| 21 | 10485782 |
| 22 | 22020119 |
| 23 | 46137368 |
| 24 | 96469017 |
| 25 | 201326618 |
| 26 | 419430427 |
| 27 | 872415260 |
| 28 | 1811939357 |
| 29 | 3758096414 |
| 30 | 7784628255 |
| 31 | 16106127392 |
| 32 | 33285996577 |