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) |
---|---|
2 | 6 |
3 | 20 |
4 | 57960 |
5 | 3145940416080 |
6 | 5765760 |
7 | 288680192354725622464710969631440008928 |
8 | 20484953806009937929429725901717124022833778640 |
9 | 59553628273094395440 |
10 | 102119994931499628863688098762720537989600 |