How can I create a matrix with diagonal structure that is neither upper nor lower triangular matrix?

Hello everyone,

I would like to create a matrix of the following structure on a large scale:

B=[2 3 4 5 6; 3 4 5 6 0; 4 5 6 0 0; 5 6 0 0 0; 6 0 0 0 0]

B = 5×5

2 3 4 5 6 3 4 5 6 0 4 5 6 0 0 5 6 0 0 0 6 0 0 0 0

How can I do this in an efficient manner?

Thank you

Answer 1

[Stephen23]

hankel(2:6)

ans = 5×5

2 3 4 5 6 3 4 5 6 0 4 5 6 0 0 5 6 0 0 0 6 0 0 0 0