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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 26 |
| 6 | 63 |
| 7 | 153 |
| 8 | 376 |
| 9 | 931 |
| 10 | 2317 |
| 11 | 5794 |
| 12 | 14545 |
| 13 | 36631 |
| 14 | 92512 |
| 15 | 234205 |
| 16 | 594169 |
| 17 | 1510192 |
| 18 | 3844787 |
| 19 | 9802895 |
| 20 | 25027296 |
| 21 | 63972861 |
| 22 | 163701327 |
| 23 | 419316330 |
| 24 | 1075049011 |
| 25 | 2758543201 |
| 26 | 7083830648 |
| 27 | 18204064403 |
| 28 | 46812088751 |
| 29 | 120452857976 |