#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    int N;
    cin >> N;

    set<array<int, 3>> st;
    vector<array<int, 3>> per = {{0, 1, 2}, {0, 2, 1}, {1, 0, 2}, 
                                 {1, 2, 0}, {2, 0, 1}, {2, 1, 0}};
    for(int x = 0; x <= N; ++x){
        for(int y = 0; x + y <= N; ++y){
            int z = N - x - y;
            if(z < 0) continue;
            array<int, 3> tmp = {x, y, z};
            for(auto [i, j, k] : per){
                st.insert({tmp[i], tmp[j], tmp[k]});
            }
        }
    }
    cout << st.size() << endl;

    return 0;
}