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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | -2 |
| 5 | 9 |
| 6 | 4 |
| 7 | 25 |
| 8 | 0 |
| 9 | 27 |
| 10 | 36 |
| 11 | 81 |
| 12 | 0 |
| 13 | 121 |
| 14 | 100 |
| 15 | 97 |
| 16 | 56 |
| 17 | 225 |
| 18 | 108 |
| 19 | 289 |
| 20 | 112 |
| 21 | 249 |
| 22 | 324 |
| 23 | 441 |
| 24 | 64 |
| 25 | 445 |
| 26 | 484 |
| 27 | 441 |
| 28 | 352 |
| 29 | 729 |
| 30 | 388 |
| 31 | 841 |
| 32 | 448 |
| 33 | 769 |
| 34 | 900 |
| 35 | 841 |
| 36 | 324 |
| 37 | 1225 |
| 38 | 1156 |
| 39 | 1137 |
| 40 | 576 |
| 41 | 1521 |
| 42 | 996 |
| 43 | 1681 |
| 44 | 1216 |
| 45 | 1161 |
| 46 | 1764 |
| 47 | 2025 |
| 48 | 704 |
| 49 | 2023 |
| 50 | 1780 |