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 | 14 |
| 5 | 27 |
| 6 | 54 |
| 7 | 107 |
| 8 | 214 |
| 9 | 427 |
| 10 | 854 |
| 11 | 1706 |
| 12 | 3410 |
| 13 | 6815 |
| 14 | 13629 |
| 15 | 27259 |
| 16 | 54521 |
| 17 | 109042 |
| 18 | 218080 |
| 19 | 436158 |
| 20 | 872318 |
| 21 | 1744638 |
| 22 | 3489278 |
| 23 | 6978546 |
| 24 | 13957092 |
| 25 | 27914186 |
| 26 | 55828364 |
| 27 | 111656716 |
| 28 | 223313428 |
| 29 | 446626866 |
| 30 | 893253744 |
| 31 | 1786507472 |
| 32 | 3573014938 |
| 33 | 7146029910 |
| 34 | 14292059832 |