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 | 0 |
| 1 | 1 |
| 2 | 30 |
| 3 | 3875 |
| 4 | 2437500 |
| 5 | 7626953125 |
| 6 | 119201660156250 |
| 7 | 9313106536865234375 |
| 8 | 3637969493865966796875000 |
| 9 | 7105423719622194766998291015625 |
| 10 | 69388931933644926175475120544433593750 |