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) |
|---|---|
| 2 | 0 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 12 |
| 7 | 24 |
| 8 | 44 |
| 9 | 84 |
| 10 | 159 |
| 11 | 300 |
| 12 | 564 |
| 13 | 1064 |
| 14 | 2004 |
| 15 | 3774 |
| 16 | 7107 |
| 17 | 13386 |
| 18 | 25208 |
| 19 | 47472 |
| 20 | 89400 |
| 21 | 168360 |
| 22 | 317055 |
| 23 | 597080 |
| 24 | 1124424 |
| 25 | 2117520 |
| 26 | 3987720 |
| 27 | 7509690 |
| 28 | 14142275 |
| 29 | 26632782 |
| 30 | 50154948 |
| 31 | 94451976 |
| 32 | 177872292 |
| 33 | 334969724 |
| 34 | 630816159 |
| 35 | 1187955204 |
| 36 | 2237161404 |