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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 15 |
| 5 | 26 |
| 6 | 54 |
| 7 | 85 |
| 8 | 159 |
| 9 | 292 |
| 10 | 513 |
| 11 | 804 |
| 12 | 1844 |
| 13 | 2965 |
| 14 | 5169 |
| 15 | 10679 |
| 16 | 20107 |
| 17 | 34120 |
| 18 | 72498 |
| 19 | 126028 |
| 20 | 245966 |
| 21 | 498852 |
| 22 | 913872 |
| 23 | 1644570 |
| 24 | 3600916 |
| 25 | 6530881 |
| 26 | 12280999 |
| 27 | 25149973 |
| 28 | 48355605 |
| 29 | 89310576 |
| 30 | 187976827 |
| 31 | 348475899 |
| 32 | 677303827 |