import java.io.*;
import java.util.*;

class Main
{
    public static void main(String args[])throws Exception
    {
        BufferedReader bu=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb=new StringBuilder();
        int t=Integer.parseInt(bu.readLine());
        while(t-->0)
        {
            int n=Integer.parseInt(bu.readLine());
            long M=998244353,ans=power(26,n/2,M)*(26+(n-1)*25)%M;
            ans=(ans-power(26,(n+1)/2,M)+M)%M;
            if(n%2==0) ans=ans-(power(26,n/2,M)-1+M)*26%M;
            ans=(ans+M)%M;
            sb.append(ans+"\n");
        }
        System.out.print(sb);
    }

    static long power(long a,long b,long M)
    {
        long res=1;
        while(b!=0)
        {
            if(b%2==1) res=res*a%M;
            b>>=1;
            a=a*a%M;
        }
        return res;
    }
}