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 | 6 |
| 5 | 11 |
| 6 | 21 |
| 7 | 39 |
| 8 | 71 |
| 9 | 141 |
| 10 | 276 |
| 11 | 542 |
| 12 | 1070 |
| 13 | 2110 |
| 14 | 4189 |
| 15 | 8351 |
| 16 | 16618 |
| 17 | 33134 |
| 18 | 66129 |
| 19 | 131937 |
| 20 | 263483 |
| 21 | 526453 |
| 22 | 1051984 |
| 23 | 2102582 |
| 24 | 4203177 |
| 25 | 8403116 |
| 26 | 16800894 |
| 27 | 33593742 |
| 28 | 67174863 |
| 29 | 134328816 |
| 30 | 268624026 |
| 31 | 537192064 |
| 32 | 1074288649 |
| 33 | 2148414285 |
| 34 | 4296543181 |
| 35 | 8592585289 |