Paskal triangle on java

import java.util.Scanner;



public class Р
{
    static void outputt(int N, int[][] Mass )
    {
        for(int i = 2; i < N; i++)
        {
            System.out.print(i-1 + " | ");
            for(int j = 1; j < i; j++ )
            {
                System.out.print(Mass[i][j] + " ");
            }
            System.out.println();
        }
    }

    static void nullput(int N, int[][] Mass)
    {
        for(int i = 0; i < N; i++ )
        {
            for(int j = 0; j < i; j++)
            {
                Mass[i][j] = 0;
            }
        }
    }

    static void paskalpower(int N, int[][] Mass)
    {
        Mass[1][1] = 1;
        for(int i = 1; i < N; i++)
        {
            for(int j = 1; j < i; j++)
            {
                Mass[i][j] = Mass[i-1][j] + Mass[i-1][j-1];
            }
        }
    }

    public static void main(String [] args)
    {
        Scanner in = new Scanner(System.in);
        final int Nmax = 20;
        int [][] Mass = new int[Nmax][];
        for(int i = 1; i < Nmax; i++)
        {
            Mass[i] = new int[i+1];
        }
        int N;
        System.out.print("Сколько строк ? -");
        N = in.nextInt();
        N += 2;
        nullput(N, Mass);
        paskalpower(N, Mass);
        outputt(N, Mass);
    }

}