A=\left[\left\{\begin{array}{ll}
0,&\hbox{za }2\mid m+n\\
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\displaystyle\frac{4mni}{(n^2-m^2)\pi},&\hbox{ina\v ce}\end{array}\right.\right]_{m=1\atop n=1}^{\infty\atop\infty}=\left[\begin{array}{ccccccc}
0&\displaystyle\frac{8i}{3\pi}&0&\displaystyle\frac{16i}{15\pi}&0&\displaystyle\frac{24i}{35\pi}&\cdots\\
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\displaystyle-\frac{8i}{3\pi}&0&\displaystyle\frac{24i}{5\pi}&0&\displaystyle\frac{40i}{21\pi}&0&\cdots\\
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0&\displaystyle-\frac{24i}{5\pi}&0&\displaystyle\frac{48i}{7\pi}&0&\displaystyle\frac{8i}{3\pi}&\cdots\\
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\displaystyle-\frac{16i}{15\pi}&0&\displaystyle-\frac{48i}{7\pi}&0&\displaystyle\frac{80i}{9\pi}&0&\cdots\\
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0&\displaystyle-\frac{40i}{21\pi}&0&\displaystyle-\frac{80i}{9\pi}&0&\displaystyle\frac{120i}{11\pi}&\cdots\\
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\displaystyle-\frac{24i}{35\pi}&0&\displaystyle-\frac{8i}{3\pi}&0&\displaystyle-\frac{120i}{11\pi}&0&\cdots\\
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\vdots&\vdots&\vdots&\vdots&\vdots&\vdots&\ddots\end{array}\right]