what is mathcad? >.> ... i'm not really following that equation
I'm a little confused because there is a formula in the book about partitioning n into exactly r parts where order counts = C(n-1,r-1)
but then there's another one that says "the number of ways of writing n as the sum of r or fewer integers where the order of the summands matters is C(r+n-1,n)"
but i didn't think they applied because order shouldn't count, should it?
I was also trying to play with the concept that the number of partitions of n into r or less parts = the number of partitions of n into parts that are r or less, but have gotten nowhere so far :\
and if m = n, then all the partitions = 1