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 | 4 |
| 3 | 14 |
| 4 | 32 |
| 5 | 77 |
| 6 | 192 |
| 7 | 452 |
| 8 | 1024 |
| 9 | 2299 |
| 10 | 5120 |
| 11 | 11270 |
| 12 | 24576 |
| 13 | 53241 |
| 14 | 114688 |
| 15 | 245768 |
| 16 | 524288 |
| 17 | 1114103 |
| 18 | 2359296 |
| 19 | 4980746 |
| 20 | 10485760 |
| 21 | 22020085 |
| 22 | 46137344 |
| 23 | 96469004 |
| 24 | 201326592 |
| 25 | 419430387 |
| 26 | 872415232 |
| 27 | 1811939342 |
| 28 | 3758096384 |
| 29 | 7784628209 |