#include <bits/stdc++.h>
#define pb push_back
#define L long long
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    long double m,b;
    cin >> m >> b;
    long double x = 0, y = b;
    long long ans = 0;
    while (y >= 0) {
        L cur = 0, add = 0, yy = (int) y;
        if (x!=0 && y!=0) {
            cur=(yy + 1) * ((x + 1) * x / 2) + (x + 1) * ((yy + 1) * yy / 2);
            ans = max(ans, cur);
        }
        if (x==0 && y==0) {

            x++;
            y = -(x/m) + b;
            continue;
        }
        if (x == 0) {
            L d=(x + 1) * ((yy + 1) * yy / 2);
            ans = max(ans, d);
        } else if (yy == 0) {
            L d=(yy + 1) * ((x + 1) * x / 2);
            ans = max(ans, d);
        }


        x++;
        y = -(x/m) + b;
    }
    cout << ans << endl;
    return 0;
}