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 | 1 |
| 1 | 10 |
| 2 | 500 |
| 3 | 125000 |
| 4 | 156250000 |
| 5 | 976562500000 |
| 6 | 30517578125000000 |
| 7 | 4768371582031250000000 |
| 8 | 3725290298461914062500000000 |
| 9 | 14551915228366851806640625000000000 |