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 | 9 |
| 3 | 49 |
| 4 | 81 |
| 5 | 289 |
| 6 | 361 |
| 7 | 1369 |
| 8 | 1681 |
| 9 | 2401 |
| 10 | 2601 |
| 11 | 2809 |
| 12 | 3249 |
| 13 | 3721 |
| 14 | 4489 |
| 15 | 5329 |
| 16 | 6561 |
| 17 | 6889 |
| 18 | 7569 |
| 19 | 7921 |
| 20 | 9801 |
| 21 | 10609 |
| 22 | 14161 |
| 23 | 14641 |
| 24 | 19321 |
| 25 | 19881 |
| 26 | 21609 |
| 27 | 22201 |
| 28 | 25921 |
| 29 | 32761 |
| 30 | 35721 |
| 31 | 36481 |
| 32 | 40401 |
| 33 | 41209 |
| 34 | 47089 |
| 35 | 49729 |
| 36 | 52441 |
| 37 | 61009 |
| 38 | 67081 |
| 39 | 77841 |