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 | 8 |
| 4 | 17 |
| 5 | 38 |
| 6 | 92 |
| 7 | 239 |
| 8 | 653 |
| 9 | 1832 |
| 10 | 5192 |
| 11 | 14726 |
| 12 | 41683 |
| 13 | 117822 |
| 14 | 333312 |
| 15 | 945952 |
| 16 | 2698117 |
| 17 | 7740920 |
| 18 | 22337788 |
| 19 | 64788768 |
| 20 | 188683267 |
| 21 | 551179370 |
| 22 | 1613612996 |
| 23 | 4731245903 |
| 24 | 13888157307 |
| 25 | 40804653640 |
| 26 | 119984904744 |
| 27 | 353085202434 |
| 28 | 1039830559085 |
| 29 | 3064566227434 |