Stirling numbers of the second kind - Wikipedia, the free encyclopedia
(I've actually done research on this topic!)
How many partitions of [n] into two blocks are there? How many partitions of [n] into n-1 blocks are there?
There are partitions of [n] into two blocks (floor(n/2) is the greatest integer less than or equal to (n/2)).
There are partitions of [n] into n-1 blocks.
Did I get this one correct?
Stirling numbers of the second kind - Wikipedia, the free encyclopedia
(I've actually done research on this topic!)