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 | 2 |
| 2 | 14 |
| 3 | 14 |
| 4 | 112 |
| 5 | 224 |
| 6 | 1792 |
| 7 | 1792 |
| 8 | 14336 |
| 9 | 28672 |
| 10 | 229376 |
| 11 | 917504 |
| 12 | 4587520 |
| 13 | 41287680 |
| 14 | 165150720 |
| 15 | 825753600 |
| 16 | 1651507200 |
| 17 | 4954521600 |
| 18 | 24772608000 |
| 19 | 74317824000 |
| 20 | 445906944000 |
| 21 | 891813888000 |
| 22 | 7134511104000 |
| 23 | 49941577728000 |
| 24 | 199766310912000 |
| 25 | 1398364176384000 |