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) |
|---|---|
| 1 | 115325637083043831900183479190311008528007516613207384396965600343647846400000 |
| 2 | 3575094749574358788905687854899641264368233015009428916305933610653083238400000 |
| 3 | 16347325453573190128511213579615837273221059920118876332835279076344751718400000 |