C++ program

Problem 1 Pentagonal numbers 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: nter Lower and Upper bound (integers) 1 100 Pentagonal Numbers from 1 t111 180 are 15 12 22 35 51 70 92 Enter Lower and Upper bound (integers) 22 156e Pentagonal Numbers from 22 till 150 are 2 35 51 70 92 117 145