\documentclass{article}
\usepackage[pdftex,active,tightpage]{preview}
\setlength\PreviewBorder{2mm}
 
\usepackage{tikz}
\usetikzlibrary{calc,shapes.multipart,chains,arrows,positioning} 

\tikzset{
    font=\tt, 
    >= stealth, 
    every picture/.style={thick}, 
    pointer/.style={*->},
    node/.style={
        align=center,
        rectangle split, rectangle split horizontal,
        rectangle split parts=#1,
        draw, 
        anchor=center, 
        rectangle split part align={center},
        rectangle split empty part width=1.5,
        rectangle split part fill = {white}
    }
}

\begin{document}
\begin{preview}
\begin{tikzpicture}
    \node[align=center, draw, fill=yellow] at (3,3){
        \tikz \node[node=7] (A) {
            \nodepart{one}
            \nodepart{two}7
            \nodepart{three}
            \nodepart{four}11
            \nodepart{five}
            \nodepart{six}15
            \nodepart{seven}
        };
    };

    \node[align=center, draw, fill=yellow] at (0,0){
        \tikz \node[node=5] (B) {
            \nodepart{one}
            \nodepart{two}1
            \nodepart{three}
            \nodepart{four}4
            \nodepart{five}
        };
    };

    \node[align=center, draw, fill=yellow] at (3,0){
        \tikz \node[node=5] (C) {
            \nodepart{one}
            \nodepart{two}4
            \nodepart{three}
            \nodepart{four}8
            \nodepart{five}
        };
    };

    \node[align=center, draw, fill=yellow] at (5.6,0){
        \tikz \node[node=3, rectangle split part fill={red, white, green}] (D) {
            \nodepart{one}
            \nodepart{two}14
            \nodepart{three}
        };
    };

    \node[align=center, draw, fill=yellow] at (7.8,0){
        \tikz \node[node=3, rectangle split part fill={blue, white, purple}] (D) {
            \nodepart{one}
            \nodepart{two}16
            \nodepart{three}
        };
    };

    \draw[pointer] (1.4, 3.1) -- ($(B)+(0,0.4)$) node[] {};
    \draw[pointer] (2.25, 3.1) -- ($(B)+(3,0.4)$) node[] {};
    \draw[pointer] (3.3, 3.1) -- ($(B)+(5.6,0.4)$) node[] {};
    \draw[pointer] (4.4, 3.1) -- ($(B)+(7.8,0.4)$) node[] {};
\end{tikzpicture}
\end{preview}
\end{document}
