What is the next number of the following sequence 6, 9, 13.5, 20.25, 30.375, .....

Answer 1

Answer is 45.5625
First number*1.5= second number

Answer 2

6, 6+6/2, 9+9/2, 13.5+(13.5)/2, 20.25+(20.25)/2, 30.375+(30.375)/2, 45.5625
ans is 45.5625.