\def\arraystretch{1.2}
\begin{center}
  \begin{longtabu}{|[2pt]c|c|c|c|c|c|c|c|[2pt]}
    \caption{Alignment pattern locations}
    \label{tab:qr_alignment}\\
    \tabucline[2pt]{-}
    Version & \multicolumn{7}{c|[2pt]}{Central x and y coordinates} \\
    \tabucline[2pt]{-}
    \endfirsthead
    \multicolumn{8}{r}{\emph{Continued from last page}}\\
    \hline
    Version & \multicolumn{7}{c|[2pt]}{Central x and y coordinates} \\
    \endhead
    Version & \multicolumn{7}{c|[2pt]}{Central x and y coordinates} \\
    \hline
    \multicolumn{8}{r}{\emph{Continued on next page}}\\
    \endfoot
    \tabucline[2pt]{-}
    \endlastfoot
     1 &     &     &     &     &     &     &     \\
    \hline
     2 &   6 &  18 &     &     &     &     &     \\
    \hline
     3 &   6 &  22 &     &     &     &     &     \\
    \hline
     4 &   6 &  26 &     &     &     &     &     \\
    \hline
     5 &   6 &  30 &     &     &     &     &     \\
    \hline
     6 &   6 &  34 &     &     &     &     &     \\
    \hline
     7 &   6 &  22 &  38 &     &     &     &     \\
    \hline
     8 &   6 &  24 &  42 &     &     &     &     \\
    \hline
     9 &   6 &  26 &  46 &     &     &     &     \\
    \hline
    10 &   6 &  28 &  50 &     &     &     &     \\
    \hline
    11 &   6 &  30 &  54 &     &     &     &     \\
    \hline
    12 &   6 &  32 &  58 &     &     &     &     \\
    \hline
    13 &   6 &  34 &  62 &     &     &     &     \\
    \hline
    14 &   6 &  26 &  46 &  66 &     &     &     \\
    \hline
    15 &   6 &  26 &  48 &  70 &     &     &     \\
    \hline
    16 &   6 &  26 &  50 &  74 &     &     &     \\
    \hline
    17 &   6 &  30 &  54 &  78 &     &     &     \\
    \hline
    18 &   6 &  30 &  56 &  82 &     &     &     \\
    \hline
    19 &   6 &  30 &  58 &  86 &     &     &     \\
    \hline
    20 &   6 &  34 &  62 &  90 &     &     &     \\
    \hline
    21 &   6 &  28 &  50 &  72 &  94 &     &     \\
    \hline
    22 &   6 &  26 &  50 &  74 &  98 &     &     \\
    \hline
    23 &   6 &  30 &  54 &  78 & 102 &     &     \\
    \hline
    24 &   6 &  28 &  54 &  80 & 106 &     &     \\
    \hline
    25 &   6 &  32 &  58 &  84 & 110 &     &     \\
    \hline
    26 &   6 &  30 &  58 &  86 & 114 &     &     \\
    \hline
    27 &   6 &  34 &  62 &  90 & 118 &     &     \\
    \hline
    28 &   6 &  26 &  50 &  74 &  98 & 122 &     \\
    \hline
    29 &   6 &  30 &  54 &  78 & 102 & 126 &     \\
    \hline
    30 &   6 &  26 &  52 &  78 & 104 & 130 &     \\
    \hline
    31 &   6 &  30 &  56 &  82 & 108 & 134 &     \\
    \hline
    32 &   6 &  34 &  60 &  86 & 112 & 138 &     \\
    \hline
    33 &   6 &  30 &  58 &  86 & 114 & 142 &     \\
    \hline
    34 &   6 &  34 &  62 &  90 & 118 & 146 &     \\
    \hline
    35 &   6 &  30 &  54 &  78 & 102 & 126 & 150 \\
    \hline
    36 &   6 &  24 &  50 &  76 & 102 & 128 & 154 \\
    \hline
    37 &   6 &  28 &  54 &  80 & 106 & 132 & 158 \\
    \hline
    38 &   6 &  32 &  58 &  84 & 110 & 136 & 162 \\
    \hline
    39 &   6 &  26 &  54 &  82 & 110 & 138 & 166 \\
    \hline
    40 &   6 &  30 &  58 &  86 & 114 & 142 & 170 \\
    \hline
  \end{longtabu}
\end{center}
\def\arraystretch{1}