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 | 25 |
| 2 | 625 |
| 3 | 900 |
| 4 | 6084 |
| 5 | 30976 |
| 6 | 138384 |
| 7 | 732736 |
| 8 | 3663396 |
| 9 | 17690436 |
| 10 | 90288004 |
| 11 | 448253584 |
| 12 | 2207496256 |
| 13 | 11142069136 |
| 14 | 55246622116 |
| 15 | 274071096324 |
| 16 | 1375342562500 |
| 17 | 6824320275600 |
| 18 | 33960175831296 |
| 19 | 169836568722496 |
| 20 | 843680456407684 |