Dimension too large bei TikZ-Schleife

\documentclass[tikz, border=3mm]{standalone}
%\documentclass{article}
\usepackage[ngerman]{babel}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{plotmarks}

\begin{document}

\begin{tikzpicture}[
x=3cm, y=3cm,  scale=0.75, 
font=\footnotesize,
>=latex,   
]

% Gitternetzlinien
\draw[help lines] (-1.5,-1.5) grid (1.5,1.5);

% x-Achse
\draw[->] (-1.5,0) -- (1.5,0) node[below] {Re$$}; 
%Zahlen auf x-Achse
\foreach \x in {-1,1,}
\draw[shift={(\x,0)},color=black] (0pt,2pt) -- (0pt,-2pt) node[below] {$\x$};

% y-Achse 
\draw[->] (0,-1.5) -- (0,1.5) node[left] {Im$$};%node[above left]
%Zahlen auf y-Achse
\foreach \y in {-1,1}
\draw[shift={(0,\y)},color=black] (2pt,0pt) -- (-2pt,0pt) node[left] {$\y$};

%Ursprung
\node[below left] {$0$};

%%%%%%%%%%%%%%%%
%Folge/Dotplot%%
%%%%%%%%%%%%%%%%
\def\nMin{-99}
\def\nMax{-\nMin}
\foreach \n in {\nMin,...,\nMax}{%====================
\draw[->,thin] plot[mark=*, mark options={color=red, fill=white}, mark size=1.75pt] 
coordinates{
( {cos((4*\n+1)/2 r)},{sin((4*\n+1)/2 r)} ) 
( {cos((4*(\n+1)+1)/2 r)},{sin((4*(\n+1)+1)/2 r)} ) 
};
}%====================

%Titel:
\node[red!95!black, align=left]  at (1,1.2) {$
\begin{aligned}
&z_k = e^{\frac{4k+1}{2}i} \\
& k = \nMin,\dots, \nMax
\end{aligned}
$};

\end{tikzpicture}

\end{document}