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 | 4 |
| 3 | 16 |
| 4 | 24 |
| 5 | 216 |
| 6 | 256 |
| 7 | 4960 |
| 8 | 10648 |
| 9 | 65536 |
| 10 | 195112 |
| 11 | 1191016 |
| 12 | 7544800 |
| 13 | 11530464 |
| 14 | 12705504 |
| 15 | 45882712 |
| 16 | 55742968 |
| 17 | 179883264 |
| 18 | 946966168 |
| 19 | 2106997768 |
| 20 | 2289529432 |
| 21 | 2548895896 |
| 22 | 3056745600 |
| 23 | 3482123272 |
| 24 | 7756683264 |
| 25 | 10735357816 |
| 26 | 15920801280 |
| 27 | 26946035992 |
| 28 | 46827274240 |