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I am wanting to produce a number matrix which will result in displaying the numbers in chronological order. For example, if a 3 x 3 matrix is desired, the output would result as such: [[1,2,3],[4,5,6],[7,8,9]]

The first part of my code can produce the initial list. However I am unsure how to append the lists that would continue this matrix.

n = int(input("Give me an integer: "))

list1 = []

i = 1

for i in range(1,n+1):

list1 = list1 +

i = i + 1

print list1

Any help or advice would be greatly appreciated. Thank you!