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 | 1 |
| 2 | 256 |
| 3 | 6560 |
| 4 | 65536 |
| 5 | 390626 |
| 6 | 1679360 |
| 7 | 5764800 |
| 8 | 16777216 |
| 9 | 43040161 |
| 10 | 100000256 |
| 11 | 214358880 |
| 12 | 429916160 |
| 13 | 815730722 |
| 14 | 1475788800 |
| 15 | 2562506560 |
| 16 | 4294967296 |
| 17 | 6975757442 |
| 18 | 11018281216 |
| 19 | 16983563040 |
| 20 | 25600065536 |
| 21 | 37817088000 |
| 22 | 54875873280 |
| 23 | 78310985280 |
| 24 | 110058536960 |
| 25 | 152588281251 |
| 26 | 208827064832 |