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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 5 |
| 7 | 10 |
| 8 | 22 |
| 9 | 46 |
| 10 | 105 |
| 11 | 234 |
| 12 | 550 |
| 13 | 1300 |
| 14 | 3158 |
| 15 | 7740 |
| 16 | 19319 |
| 17 | 48628 |
| 18 | 123866 |
| 19 | 317954 |
| 20 | 823064 |
| 21 | 2144504 |
| 22 | 5623755 |
| 23 | 14828073 |
| 24 | 39299896 |
| 25 | 104636889 |
| 26 | 279793449 |
| 27 | 751065459 |
| 28 | 2023443031 |
| 29 | 5469566584 |
| 30 | 14830871801 |
| 31 | 40330829029 |
| 32 | 109972410220 |
| 33 | 300628862479 |