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 | 4 |
| 2 | 512 |
| 3 | 8748 |
| 4 | 16641 |
| 5 | 65536 |
| 6 | 312500 |
| 7 | 1119744 |
| 8 | 2130048 |
| 9 | 3294172 |
| 10 | 4787344 |
| 11 | 5359225 |
| 12 | 8388608 |
| 13 | 19131876 |
| 14 | 36393867 |
| 15 | 40000000 |
| 16 | 77948684 |
| 17 | 143327232 |
| 18 | 250994068 |
| 19 | 268468225 |
| 20 | 272646144 |
| 21 | 344882041 |
| 22 | 421654016 |
| 23 | 612780032 |
| 24 | 683437500 |
| 25 | 685980800 |
| 26 | 1073741824 |
| 27 | 1300078125 |