Build a matrix according to the formula (interested in the value of the element "............")?

Question

Java

1 1 1 .... 1 1 1
0 1 1 .... 1 1 0
0 0 1 .... 1 0 0
....... <-- How to understand this? Type to do as from above or as from below by choice?
0 0 1 .... 1 0 0
0 1 1 .... 1 1 0
1 1 1 .... 1 1 1
Or something else?

Answer 1

It looks like you need to "mirror" the top part to get the full matrix.
And the line is, as it were, the axis of symmetry of the final matrix.

Answer 2

The person who gave you this assignment expects you to see a pattern in the data presented that makes it unnecessary to specify specific values ​​instead of points.

Answer 3

You just have up and down diagonals of one. Sort of like an hourglass. From this, dance.

Answer 4

Apparently, this is a square matrix with an arbitrary, but necessarily equal and even number of elements in its width and height.
There are always two identical rows in the center of the matrix:

0000000..00000011000000..0000000
0000000..00000011000000..0000000

For one cycle - 2 rows are filled at once from the center of the matrix to its extreme rows.