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 | 11 |
| 1 | 22 |
| 2 | 44 |
| 3 | 88 |
| 4 | 176 |
| 5 | 352 |
| 6 | 704 |
| 7 | 1408 |
| 8 | 2816 |
| 9 | 5632 |
| 10 | 11264 |
| 11 | 22528 |
| 12 | 45056 |
| 13 | 90112 |
| 14 | 180224 |
| 15 | 360448 |
| 16 | 720896 |
| 17 | 1441792 |
| 18 | 2883584 |
| 19 | 5767168 |
| 20 | 11534336 |
| 21 | 23068672 |
| 22 | 46137344 |
| 23 | 92274688 |
| 24 | 184549376 |
| 25 | 369098752 |
| 26 | 738197504 |
| 27 | 1476395008 |
| 28 | 2952790016 |
| 29 | 5905580032 |
| 30 | 11811160064 |