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 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 225 |
| 6 | 576 |
| 7 | 900 |
| 8 | 2209 |
| 9 | 27225 |
| 10 | 38809 |
| 11 | 44521 |
| 12 | 50625 |
| 13 | 57121 |
| 14 | 155236 |
| 15 | 166464 |
| 16 | 178084 |
| 17 | 4796100 |
| 18 | 5978025 |
| 19 | 7535025 |
| 20 | 8732025 |
| 21 | 10017225 |
| 22 | 30140100 |
| 23 | 32490000 |
| 24 | 73359225 |
| 25 | 1475865889 |
| 26 | 1490963769 |
| 27 | 1506138481 |
| 28 | 1521390025 |