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 | 4 |
| 4 | 9 |
| 5 | 64 |
| 6 | 225 |
| 7 | 256 |
| 8 | 245 |
| 9 | 16384 |
| 10 | 99225 |
| 11 | 65536 |
| 12 | 480249 |
| 13 | 1048576 |
| 14 | 1002001 |
| 15 | 4194304 |
| 16 | 41409225 |
| 17 | 1073741824 |
| 18 | 2393453205 |
| 19 | 4294967296 |
| 20 | 4102737925 |
| 21 | 68719476736 |
| 22 | 940839860961 |
| 23 | 274877906944 |
| 24 | 4113258565689 |
| 25 | 17592186044416 |