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 | 12 |
| 1 | 48 |
| 2 | 144 |
| 3 | 384 |
| 4 | 960 |
| 5 | 2304 |
| 6 | 5376 |
| 7 | 12288 |
| 8 | 27648 |
| 9 | 61440 |
| 10 | 135168 |
| 11 | 294912 |
| 12 | 638976 |
| 13 | 1376256 |
| 14 | 2949120 |
| 15 | 6291456 |
| 16 | 13369344 |
| 17 | 28311552 |
| 18 | 59768832 |
| 19 | 125829120 |
| 20 | 264241152 |
| 21 | 553648128 |
| 22 | 1157627904 |
| 23 | 2415919104 |
| 24 | 5033164800 |
| 25 | 10468982784 |
| 26 | 21743271936 |
| 27 | 45097156608 |
| 28 | 93415538688 |