If, for all integers n ≥ 1, xnxn is the probability of selecting at random an integer with an odd number of unique positive factors from among the positive integers less than or equal to n^2, then the sum of the first 5 values of xnxn is	Select
A) less than 1
B) between 1 and 2
C) between 2 and 3
D) between 3 and 4
E) greater than 4
x1 : 1/1   x2 : 1,4 of 1,2,3,4 ----2/4   x3 : 1,4,9 of 1,2...9 ----3/9   x4 : 1,4,9,16----------4/16   x5 : 1,4,9,16,25--------5/25   Total 1+2/4+3/9+4/16+5/25 = 2.3   between 2 and 3 is the right answer
<result>C</result>
If, for all integers n ≥ 1, xnxn is the probability of selecting at random an integer with an odd number of unique positive factors from among the positive integers less than or equal to n^2, then the sum of the first 5 values of xnxn is