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 | 2 |
| 2 | 5 |
| 3 | 12 |
| 4 | 28 |
| 5 | 64 |
| 6 | 144 |
| 7 | 320 |
| 8 | 704 |
| 9 | 1536 |
| 10 | 3328 |
| 11 | 7168 |
| 12 | 15360 |
| 13 | 32768 |
| 14 | 69632 |
| 15 | 147456 |
| 16 | 311296 |
| 17 | 655360 |
| 18 | 1376256 |
| 19 | 2883584 |
| 20 | 6029312 |
| 21 | 12582912 |
| 22 | 26214400 |
| 23 | 54525952 |
| 24 | 113246208 |
| 25 | 234881024 |
| 26 | 486539264 |
| 27 | 1006632960 |
| 28 | 2080374784 |
| 29 | 4294967296 |
| 30 | 8858370048 |
| 31 | 18253611008 |
| 32 | 37580963840 |