Squarefree Numbers
May 10, 2008
A positive integer n is called squarefree, if no square of a prime divides n, thus 1, 2, 3, 5, 6, 7, 10, 11 are squarefree, but not 4, 8, 9, 12.
How many squarefree numbers are there below 250?
Written by gamwe6 who lives and works in San Francisco building useful things. You should follow him on Twitter