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## Main Question or Discussion Point

[tex]

\begin{array}{c}

{{A_n}={\sqrt{\sum _{z=1}^{n}{z^2}}} } \\

{{A_1}=1 } \\

{{A_{24}}=70}\end{array}\

[/tex]

Is there a proof that only for n =1 or n=24 that An is an integer quantity?

\begin{array}{c}

{{A_n}={\sqrt{\sum _{z=1}^{n}{z^2}}} } \\

{{A_1}=1 } \\

{{A_{24}}=70}\end{array}\

[/tex]

Is there a proof that only for n =1 or n=24 that An is an integer quantity?