corejava-programming: Program to print the result of the series sum

import java.util.Scanner;

class Series{
public static void main(String [] args){
int a,b,c,n;
Scanner sc=new Scanner(System.in);
a=sc.nextInt();
b=sc.nextInt();
c=sc.nextInt();
n=sc.nextInt();

System.out.println(getAns(a,b,c,n));

}
public static int getAns(int a,int b,int c, int n){
int ans=a *(a+b);
if(n >1){

for(int i=1;i<n;i++){

ans=ans+((a+(i*c))*(a+b+(i*c)));

}

}
return ans;
}

}