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 | 5 |
2 | 2520 |
3 | 9909900 |
4 | 150089940000 |
5 | 6217438242015000 |
6 | 574985352122181000000 |
7 | 103753754577643425255000000 |
8 | 33189544956070738228953960000000 |
9 | 17517292900368819935211385551000000000 |
10 | 14427024664929016470240101675459976000000000 |