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) |
|---|---|
| 2 | 2 |
| 3 | 16 |
| 4 | 48 |
| 5 | 512 |
| 6 | 1280 |
| 7 | 2048 |
| 8 | 14336 |
| 9 | 262144 |
| 10 | 589824 |
| 11 | 2621440 |
| 12 | 5767168 |
| 13 | 50331648 |
| 14 | 109051904 |
| 15 | 469762048 |
| 16 | 67108864 |
| 17 | 34359738368 |
| 18 | 73014444032 |
| 19 | 103079215104 |
| 20 | 652835028992 |
| 21 | 1099511627776 |
| 22 | 3848290697216 |
| 23 | 48378511622144 |