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 | 3 |
| 2 | 60 |
| 3 | 1989 |
| 4 | 92160 |
| 5 | 5486535 |
| 6 | 399072960 |
| 7 | 34298042625 |
| 8 | 3400783626240 |
| 9 | 382128386114475 |
| 10 | 47986411423104000 |
| 11 | 6659996213472126525 |
| 12 | 1012334387351519232000 |
| 13 | 167253493686752981883375 |
| 14 | 29842935065036371998720000 |
| 15 | 5719198821953333723419037625 |
| 16 | 1171620424982972483984424960000 |