Using C++

A pentagonal number is defined as n(3n-1)/2 for n-1, 2,.. ., Hence, the values of the first few numbers are 1, 5, 12, 22, 35, 51.... Write a program that prints all Pentagonal numbers within a lower bound and an upper bound entered by the user, see given sample input/output Sample input/output: Enter Lower and Upper bound (integers) 22 15e Pentagonal Numbers from 22 till 150 are 22 35 51 70 92 117 145 Enter Lower and Upper bound (integers) 1 1ee Pentagonal Numbers from 1 till 100 are 1 5 12 22 35 51 7e 92