#include <bits/stdc++.h>

using namespace std;
int n,ans=0;
bool two(int x,int y);
bool three(int x,int y);
int main()
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        for(int j=i+1;j<=n;j++){
            if(two(i,j)&&three(i,j)){
                ans+=2;

            }
        }
    }
    printf("%d",ans);
    return 0;
}

bool two(int x,int y){
    int a[50],b[50];
    int j=x,k=y,as=0,bs=0;
    while(j){
        a[++as]=j%2;
        j/=2;

    }
    while(k){
        b[++bs]=k%2;
        k/=2;

    }
    int Min=min(as,bs);
    for(int i=1;i<=Min;i++){
        int t=a[i]+b[i];
        if(t>=2) return false;
    }
    return true;
}


bool three(int x,int y){
    int a[50],b[50];
    int j=x,k=y,as=0,bs=0;
    while(j){
        a[++as]=j%3;
        j/=3;

    }
    while(k){
        b[++bs]=k%3;
        k/=3;

    }
    int Min=min(as,bs);
    for(int i=1;i<=Min;i++){
        int t=a[i]+b[i];
        if(t>=3) return false;
    }
    return true;
}