Steinhaus-Moser Notation is a notation created by Hugo Steinhaus, and extended by Leo Moser. The formula is: * Triangle(n) = nn = File:Steinhaustriangle.svg * Square(n) = \(\boxed{n}\) = n inside n triangles * Circle(n) = ⓝ = n inside n squares Triangle(n) would be graphically displayed by n inside a triangle, and the same for Square and Circle. Leo Moser extends this notation with pentagons, hexagons, heptagons, octagons, etc., where n inside a x-gon is equal to x inside n (x - 1)-gons. Of course, circles are no longer used in this version, and are replaced by pentagons.