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) |
|---|---|
| 0 | 9 |
| 1 | 1 |
| 2 | 1 |
| 3 | 25 |
| 4 | 25 |
| 5 | 1 |
| 6 | 121 |
| 7 | 225 |
| 8 | 9 |
| 9 | 529 |
| 10 | 1681 |
| 11 | 441 |
| 12 | 1849 |
| 13 | 11025 |
| 14 | 6889 |
| 15 | 4225 |
| 16 | 64009 |
| 17 | 73441 |
| 18 | 2209 |
| 19 | 326041 |
| 20 | 632025 |
| 21 | 31329 |
| 22 | 1413721 |
| 23 | 4669921 |
| 24 | 1320201 |
| 25 | 4844401 |
| 26 | 30371121 |
| 27 | 19882681 |
| 28 | 10582009 |
| 29 | 174847729 |
| 30 | 208196041 |
| 31 | 4190209 |
| 32 | 882030601 |
| 33 | 1770810561 |