Counting contiguous numbers within a list

I am completely new to the topic of programming but interested. I am coding in python 3.x and have a question to my latest topic:

We have a list, containing a few tenthousands of randomly generated integers between 1 and 7.

import random

list_of_states = []
n = int(input('Enter number of elements:'))

for i in range(n):
    list_of_states.append(random.randint(1,7))

print (list_of_states)

Afterwards, I would like to count the contiguous numbers in this list and put them into an numpy.array

example: [1, 2, 3, 4, 4, 4, 7, 3, 1, 1, 1]

1    1
2    1
3    1
4    3
7    1
3    1
1    1 

I would like to know whether someone has a hint/an idea of how I could do this. This part is a smaller part of a markov chain wherefor I need the frequency of each number.

Thanks for sharing Nadim