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) |
|---|---|
| 3 | 48 |
| 4 | 1344 |
| 5 | 23580 |
| 6 | 3273360 |
| 7 | 257165468 |
| 8 | 171785923808 |
| 9 | 61997157648756 |
| 10 | 196554899918485160 |