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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 9 |
| 5 | 19 |
| 6 | 43 |
| 7 | 79 |
| 8 | 162 |
| 9 | 307 |
| 10 | 607 |
| 11 | 1075 |
| 12 | 2186 |
| 13 | 3872 |
| 14 | 7573 |
| 15 | 15101 |
| 16 | 29139 |
| 17 | 52295 |
| 18 | 104953 |
| 19 | 189915 |
| 20 | 379275 |
| 21 | 754081 |
| 22 | 1462115 |
| 23 | 2675851 |
| 24 | 5351541 |
| 25 | 10254019 |
| 26 | 19987942 |
| 27 | 38901233 |
| 28 | 77620568 |
| 29 | 144021667 |
| 30 | 288428481 |
| 31 | 537642772 |
| 32 | 1056802340 |
| 33 | 2113152353 |
| 34 | 4138261885 |