I am trying to draw *n* open squares with numbers inside. The objective to make notes on combinatorics with *n* balls and *n* boxes types of problems. I could draw circles using help from this site. I used the following for circles:

```
\documentclass{article}
\usepackage{tikz}
\newcommand*\circled[1]{\tikz[baseline=(char.base)]{
        \node[shape=circle,draw,inner sep=8pt] (char) {#1};}}
\begin{document}
\circled{1} \circled{2} \circled{3} $\ldots$ \circled{k}
\end{document}

```

I have been looking for something similar for squares. Any help?

EDIT: I tried egreg's comments and put `shape=rectangle`. But how do I draw open boxes?