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 | 3 |
| 1 | 5 |
| 2 | 10 |
| 3 | 19 |
| 4 | 37 |
| 5 | 71 |
| 6 | 137 |
| 7 | 264 |
| 8 | 509 |
| 9 | 981 |
| 10 | 1891 |
| 11 | 3645 |
| 12 | 7026 |
| 13 | 13543 |
| 14 | 26105 |
| 15 | 50319 |
| 16 | 96993 |
| 17 | 186960 |
| 18 | 360377 |
| 19 | 694649 |
| 20 | 1338979 |
| 21 | 2580965 |
| 22 | 4974970 |
| 23 | 9589563 |
| 24 | 18484477 |
| 25 | 35629975 |
| 26 | 68678985 |
| 27 | 132383000 |
| 28 | 255176437 |
| 29 | 491868397 |
| 30 | 948106819 |
| 31 | 1827534653 |
| 32 | 3522686306 |
| 33 | 6790196175 |