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 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 9 |
| 6 | 64 |
| 7 | 25 |
| 8 | 256 |
| 9 | 1225 |
| 10 | 16384 |
| 11 | 3969 |
| 12 | 65536 |
| 13 | 53361 |
| 14 | 1048576 |
| 15 | 184041 |
| 16 | 4194304 |
| 17 | 41409225 |
| 18 | 1073741824 |
| 19 | 147744025 |
| 20 | 4294967296 |
| 21 | 2133423721 |
| 22 | 68719476736 |
| 23 | 7775536041 |
| 24 | 274877906944 |
| 25 | 457028729521 |
| 26 | 17592186044416 |
| 27 | 1690195005625 |