MATLAB
#1 19
#2 9
#3 9
#4 7
#5 6
#6 6
#7 5
#8 5
#9 4
#10 3
#11 3
#12 3
#13 2
#14 2
#15 1
#16 1
#17 1
#18 1
#19 1
#20 1