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 | 16 |
| 5 | 36 |
| 6 | 81 |
| 7 | 225 |
| 8 | 625 |
| 9 | 1600 |
| 10 | 4096 |
| 11 | 10816 |
| 12 | 28561 |
| 13 | 74529 |
| 14 | 194481 |
| 15 | 509796 |
| 16 | 1336336 |
| 17 | 3496900 |
| 18 | 9150625 |
| 19 | 23961025 |
| 20 | 62742241 |
| 21 | 164249856 |
| 22 | 429981696 |
| 23 | 1125736704 |
| 24 | 2947295521 |
| 25 | 7716041281 |
| 26 | 20200652641 |
| 27 | 52886200900 |
| 28 | 138458410000 |