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 | 1 |
2 | 30240 |
3 | 60480 |
4 | 51597803520 |
5 | 687009790646587541893939200 |
6 | 2639216811747930700939756830720000000 |
7 | 399953837788563897626396208106026886244605021117749733129069000654848000000000 |