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 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 32 |
| 5 | 65 |
| 6 | 192 |
| 7 | 385 |
| 8 | 1024 |
| 9 | 2049 |
| 10 | 5120 |
| 11 | 10241 |
| 12 | 24576 |
| 13 | 49153 |
| 14 | 114688 |
| 15 | 229377 |
| 16 | 524288 |
| 17 | 1048577 |
| 18 | 2359296 |
| 19 | 4718593 |
| 20 | 10485760 |
| 21 | 20971521 |
| 22 | 46137344 |
| 23 | 92274689 |
| 24 | 201326592 |
| 25 | 402653185 |
| 26 | 872415232 |
| 27 | 1744830465 |
| 28 | 3758096384 |
| 29 | 7516192769 |
| 30 | 16106127360 |
| 31 | 32212254721 |