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

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(nullptr);
    int T=1;
    //cin>>T;
    
    for(int dalekofrivia=T; dalekofrivia>0; dalekofrivia--){
        int b;
        cin>>b;
        //b=100000;
        int n = 2*b-1;
        cout<<n<<endl;
        int a = n*1000000;
        for(int i=0; i<b; i++){
            cout<<a<<" ";
            if(i+1!=b){
                int c = a+1;
                c+=n+1-2*i-3-((n+1-2*i)*a+c)%(n+1-2*i-3);
                cout<<c<<" ";
                a=((n+1-2*i)*a+c)/(n+1-2*i-3);
            }
        }
    }

    return 0;
}