My Personal Solution using two dimensional
array

This is my c form code.

#include <stdio.h>

#define N 20 // dimension 

int main() {
    int yTri[N][N] = {0};
    for(int row = 0; row < N; ++row){
        for(int col=0; col<= row; ++col){
            if(col==0){
                yTri[row][col] = 1;    // the first element in each row set to 1
            } else {
                yTri[row][col] = yTri[row - 1 ][col - 1] + yTri[row - 1 ][col] ; // the previous row and column addition to produce the current number
            }
            printf("%4d", yTri[row][col]);
        }
        printf("\n");
    }
    return 0;
}

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