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 | 8 |
| 1 | 12 |
| 2 | 16 |
| 3 | 32 |
| 4 | 80 |
| 5 | 176 |
| 6 | 368 |
| 7 | 752 |
| 8 | 1520 |
| 9 | 3424 |
| 10 | 8592 |
| 11 | 20096 |
| 12 | 70464 |
| 13 | 235072 |
| 14 | 705280 |
| 15 | 3023616 |
| 16 | 13223680 |
| 17 | 55540736 |
| 18 | 278539264 |
| 19 | 1392697344 |
| 20 | 9541095424 |
| 21 | 58609614848 |
| 22 | 410267320320 |
| 23 | 3397142953984 |
| 24 | 24143851798528 |
| 25 | 176071227916288 |
| 26 | 1232666139967488 |
| 27 | 9523075842834432 |