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 | 7 |
| 4 | 13 |
| 5 | 24 |
| 6 | 46 |
| 7 | 89 |
| 8 | 175 |
| 9 | 346 |
| 10 | 688 |
| 11 | 1371 |
| 12 | 2737 |
| 13 | 5468 |
| 14 | 10930 |
| 15 | 21853 |
| 16 | 43699 |
| 17 | 87390 |
| 18 | 174772 |
| 19 | 349535 |
| 20 | 699061 |
| 21 | 1398112 |
| 22 | 2796214 |
| 23 | 5592417 |
| 24 | 11184823 |
| 25 | 22369634 |
| 26 | 44739256 |
| 27 | 89478499 |
| 28 | 178956985 |
| 29 | 357913956 |
| 30 | 715827898 |
| 31 | 1431655781 |
| 32 | 2863311547 |