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 | 81 |
| 2 | 324 |
| 3 | 1296 |
| 4 | 3600 |
| 5 | 10000 |
| 6 | 22500 |
| 7 | 50625 |
| 8 | 99225 |
| 9 | 194481 |
| 10 | 345744 |
| 11 | 614656 |
| 12 | 1016064 |
| 13 | 1679616 |
| 14 | 2624400 |
| 15 | 4100625 |
| 16 | 6125625 |
| 17 | 9150625 |
| 18 | 13176900 |
| 19 | 18974736 |
| 20 | 26501904 |
| 21 | 37015056 |
| 22 | 50381604 |
| 23 | 68574961 |
| 24 | 91298025 |
| 25 | 121550625 |
| 26 | 158760000 |
| 27 | 207360000 |