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 | 75 |
| 2 | 3500 |
| 3 | 131250 |
| 4 | 4344375 |
| 5 | 132890625 |
| 6 | 3855156250 |
| 7 | 107765625000 |
| 8 | 2933008203125 |
| 9 | 78271552734375 |
| 10 | 2058270703125000 |
| 11 | 53524929199218750 |
| 12 | 1380066321044921875 |
| 13 | 35349237725830078125 |
| 14 | 900813505310058593750 |
| 15 | 22863955398559570312500 |
| 16 | 578500758117828369140625 |