#include <fstream>

using namespace std;

ifstream f("pascal.in");
ofstream g("pascal.out");

int d,r,i,P[7],ANS=0,m;
int main ()
{
    f >> r >> d;

    for (i=1;i<=r/2;i++)
    {
        m=r-i+1;
        while (m%2==0) P[2]++,m/=2;
        while (m%3==0) P[3]++,m/=3;
        while (m%5==0) P[5]++,m/=5;
        m=i;
        while (m%2==0) P[2]--,m/=2;
        while (m%3==0) P[3]--,m/=3;
        while (m%5==0) P[5]--,m/=5;

        P[6]=min(P[2],P[3]);

        if (d==2 && P[2]>0) ANS+=2;
        if (d==3 && P[3]>0) ANS+=2;
        if (d==4 && P[2]>1) ANS+=2;
        if (d==5 && P[5]>0) ANS+=2;
        if (d==6 && P[6]>0) ANS+=2;
    }

    g << ANS << '\n';
    f.close();g.close();
    return 0;
}