Monday, October 13, 2025

Visual representation of Fermat numbers

 Images that show a visual representation of Fermat numbers and how those images can be used to create tessellations and other types of mathematical art.

The images are a combination of  visual geometry and visual number theory with an art component.

The images are based on square grids

The starting point for the Fermat numbers (3,5,17,257...) is a 3x3 square grid.



Fermat numbers

3x3 square grid


This square grid has 4 crossing points in the center.



Fermat numbers


A new square is drawn inside of the 3x3 square grid. Parallel lines to the new square are drawn that pass through the 4 crossing middle points mentioned before. We now have a 5x5 square grid inside of the original 3x3 square grid.

Fermat numbers

3x3 and 5x5 square grid


The new 5x5 square grid has now 16 crossing points inside the square.

Following the same process as before:


Fermat numbers


Draw a new square inside the 5x5 square grid, add parallel lines to the new square that pass through the crossing points and we now have a 17x17 square grid with 256 crossing points inside.

3x3 grid and filling of the plane


5x5 grid and filling of the plane



Tessellation