A menger sponge is a fractal made out of cubes within cubes within cubes...
If you start with a cube, on each face there are 9 squares. The middle square becomes empty (or 0). The other 8 squares iterate this process. They each get split up into 9 squares and the middle square face is taken out.
The goal today is to generate a menger sponge face, not the cube.
Here are some example given an input for the number of iterations.
0: 1 (No holes or anything, solid face) 1: 1 1 1 1 0 1 1 1 1 2: 111111111 101101101 111111111 111000111 101000101 111000111 111111111 101101101 111111111
To complete the challenge, based on an input, return a set of 1 (filled in blocks) and 0 (empty blocks) with spaces between or not.
This is code golf, lowest number of bytes wins.