#include<cstdio>

#include<cstring>

#include<algorithm>

#define LL long long

using namespace std;

LL read(){

    LL ans=,f=,c=getchar();

    while(c<''||c>''){if(c=='-') f=-; c=getchar();}

    while(c>=''&&c<=''){ans=ans*+(c-''); c=getchar();}

    return ans*f;

}

LL m,b,ans;

int main()

{

    m=read(); b=read();

    for(LL y=b;y>=;y--){

        LL x=m*b-m*y;

        LL sum1=(+x)*x*(y+)/,sum2=(+y)*y*(x+)/;

        ans=max(ans,sum1+sum2);

    }

    printf("%lld\n",ans);

    return ;

}