\documentclass[10pt,border=1pt,tikz,class=scrartcl]{standalone} \usepackage[T1]{fontenc} \usepackage[latin1]{inputenc} \usepackage{lmodern} \usepackage{mathtools} \usepackage{bytefield} \usetikzlibrary{calc} \pagestyle{empty} \begin{document} 	\scriptsize \begin{tikzpicture} 	\xdef\r{1.2} 	\xdef\p {} 	\foreach \a in {0,120,240} 		\xdef\p {\p ({\r * sin(\a)}, {\r * cos(\a)}) -- }; 	\foreach \a in {0,60,...,300} 		\coordinate (p\a) at ({\r * sin(\a)}, {\r * cos(\a)}); 	\draw [thick] \p cycle; 	\draw[rotate=60,thick] \p cycle; 	\node {$n\choose k$}; 	\node [anchor=south] at (p0) {$n\choose k+1$}; 	\node [anchor=west] at (p60) {$n+1\choose k+1$}; 	\node [anchor=west] at (p120) {$n+1\choose k$}; 	\node [anchor=north] at (p180) {$n\choose k-1$}; 	\node [anchor=east] at (p240) {$n-1\choose k-1$}; 	\node [anchor=east] at (p300) {$n-1\choose k$}; \end{tikzpicture} \end{document}