#include <iostream>

int integral(int d){
    int area = 0;
    for(int i = 1; i < (600 / d); ++i){
        area += (d * (i  * d) * (i * d));
    }
    return area;
}

int main(){
    int d;
    while(std::cin >> d){
        if(d == -1)  break;
        std::cout << integral(d) << std::endl;
    }
    return 0;
}