x = [0] * 10
for i in range(len(x)):
    x[i] = [0] * (i + 1)
    for j in range(len(x[i])):
        x[i][0] = x[i][-1] = 1
        
        
for i in range(2,len(x)):
    for j in range(1, len(x[i])):
        if j < len(x[i]) - 1:
            x[i][j] = x[i-1][j-1] + x[i-1][j]        
            
        else:
            break
    


s = 0
y = [0] * 10
for i in range(len(y)):
    y[i] = [' '] * 20
    for j in range(len(y[i])):
        if i >= j:
            y[i][10-i+s] = x[i][j]
            s += 2
        else:
            s = 0
            break        
        print(y[i][j], end=' ')
    print()        

Printing Results：

      1 
    1   6 
  1   7   21 
1   8   28   56 

1 9 36 84 126

To make it easier to see, change the character space to 0, as shown below：

0
0 0
0 0 0
0 0 0 0
0 0 0 0 0
0 0 0 0 0 1
0 0 0 0 1 0 6
0 0 0 1 0 7 0 21
0 0 1 0 8 0 28 0 56
0 1 0 9 0 36 0 84 0 126

Why does it start printing from row 5 and column 5?