def pascal(n):
    if n==1:
        return [1]
    else:
        line = [1]
        previous_line=pascal(n-1)
        print (previous_line)
        for i in range(len(previous_line)-1):
            line.append(previous_line[i] + previous_line[i+1])
        line += [1]
        return line


print (pascal(7))