# Removing boxes in a ytableau

I am attempting to draw a ytableau where I remove the boxes around the outermost part of the table. Basically, what I would like to do is remove the boxes around all of the numbers in the example below. Any Ideas on how to do this?

MWE:

\documentclass[12pt]{article}
\usepackage{ytableau}
\begin{document}

\begin{ytableau}
1 \\
& 2 \\
& & 3 \\
& & & 4 \\
\end{ytableau}

\end{document}


Output:

-

The package ytableau provides a command \none to make on empty box. What it does not advertise so much is that this command takes an optional argument, the contents of that box. So \none[1] will produce an unframed 1 as you request.

\documentclass[12pt]{article}
\usepackage{ytableau}
\begin{document}

\begin{ytableau}
\none[1] \\
& \none[2] \\
& & \none[3] \\
& & & \none[4] \\
\end{ytableau}

\end{document}

-