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 | 225 |
| 2 | 729 |
| 3 | 1521 |
| 4 | 2601 |
| 5 | 3969 |
| 6 | 5625 |
| 7 | 7569 |
| 8 | 9801 |
| 9 | 12321 |
| 10 | 15129 |
| 11 | 18225 |
| 12 | 21609 |
| 13 | 25281 |
| 14 | 29241 |
| 15 | 33489 |
| 16 | 38025 |
| 17 | 42849 |
| 18 | 47961 |
| 19 | 53361 |
| 20 | 59049 |
| 21 | 65025 |
| 22 | 71289 |
| 23 | 77841 |
| 24 | 84681 |
| 25 | 91809 |
| 26 | 99225 |
| 27 | 106929 |
| 28 | 114921 |
| 29 | 123201 |