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 | 4 |
| 2 | 32 |
| 3 | 192 |
| 4 | 1024 |
| 5 | 5120 |
| 6 | 24576 |
| 7 | 114688 |
| 8 | 524288 |
| 9 | 2359296 |
| 10 | 10485760 |
| 11 | 46137344 |
| 12 | 201326592 |
| 13 | 872415232 |
| 14 | 3758096384 |
| 15 | 16106127360 |
| 16 | 68719476736 |
| 17 | 292057776128 |
| 18 | 1236950581248 |
| 19 | 5222680231936 |
| 20 | 21990232555520 |
| 21 | 92358976733184 |
| 22 | 387028092977152 |
| 23 | 1618481116086272 |