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 | 16 |
| 2 | 240 |
| 3 | 3600 |
| 4 | 54000 |
| 5 | 810000 |
| 6 | 12150000 |
| 7 | 182250000 |
| 8 | 2733750000 |
| 9 | 41006250000 |
| 10 | 615093749880 |
| 11 | 9226406246400 |
| 12 | 138396093669120 |
| 13 | 2075941404633600 |
| 14 | 31139121063456000 |
| 15 | 467086815861120000 |
| 16 | 7006302236556000000 |