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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 16 |
| 5 | 32 |
| 6 | 128 |
| 7 | 256 |
| 8 | 1024 |
| 9 | 6144 |
| 10 | 12288 |
| 11 | 73728 |
| 12 | 294912 |
| 13 | 589824 |
| 14 | 2359296 |
| 15 | 14155776 |
| 16 | 84934656 |
| 17 | 169869312 |
| 18 | 1019215872 |
| 19 | 4076863488 |
| 20 | 8153726976 |
| 21 | 48922361856 |
| 22 | 195689447424 |
| 23 | 1174136684544 |
| 24 | 9393093476352 |
| 25 | 37572373905408 |
| 26 | 75144747810816 |
| 27 | 300578991243264 |
| 28 | 601157982486528 |