Source code for utils.p3x1

import matplotlib.pyplot as plt


def p3x1(v):
    pattern.append(int(v))
    if v == 1:
        return
        # print('End: ', pattern)
    else:
        if v%2 == 0:
            return p3x1(v/2)
        else:
            return p3x1(3*v + 1)


if __name__ == '__main__':

    for i in range(3, 150):
        pattern = []
        p3x1(i)
        plt.plot(pattern, marker='o')

    plt.show()