The following code makes use of the chappg package to define the page numbers as chapter numbers.
\documentclass[openany]{book}
\usepackage{lipsum}
\usepackage[noauto]{chappg}
\renewcommand*{\thepage}{\arabic{chapter}}
\begin{document}
\LARGE
\chapter{}
%\chapter{1} \setcounter{chapter}{1}
\lipsum[1-4]
\chapter{}
%\chapter{2} \setcounter{chapter}{2}
\lipsum[1-2]
\chapter{}
%\chapter*{3} \setcounter{chapter}{3}
\lipsum[3-4]
\end{document}
And it works quite nicely, except that the word "Chapter" appears to the left of the chapter number; e.g.,
I know that using, say, \chapter*{1} will print out only the number 1; \chapter*{2} only the number 2; and so forth... but when I replace each \chapter{} with \chapter*{number}, the pagenumbering is thrown out of whack and displays only zeros.
The following (cumbersome) code corrects this and gives me what I am looking for:
\begin{document}
\LARGE
%\chapter{}
\chapter*{1} \setcounter{chapter}{1}
\lipsum[1-4]
%\chapter{}
\chapter*{2} \setcounter{chapter}{2}
\lipsum[1-2]
%\chapter{}
\chapter*{3} \setcounter{chapter}{3}
\lipsum[3-4]
\end{document}
However, to keep specifying \setcounter{chapter}{#} will become unwieldy when there are a lot of chapters in the document.
QUESTION: What is an optimal way to have (i) the chapters indicated by their numbers only, and (ii) the page numbers represent those chapter numbers---without resorting to the continual use of \setcounter{chapter}{#} each time a new chapter is introduced? Is it possible to avoid also, the continual use of \chapter*{#} and replace it with something analogous to \chapter{} as in the MWE? (\chapter*{} does not work)?
Thank you.


\usepackage[noauto]{chappg}is used in the MWE; also, the formatting of the chapter title adversely affects the code in the MWE, thus necessitating a much more complicated and laborious approach to accomplishing what the MWE does, with the only change being the formatted title. Thus I ask, how may\chappgbe used (most) efficiently in this case. – DDS Sep 24 '21 at 14:19\pagenumbering{bychapter}. – Ulrike Fischer Sep 24 '21 at 14:30\chapterstyle{section}. – Ulrike Fischer Sep 24 '21 at 14:36\pagenumbering{bychapter}, I will probably reread some of the documentation onchappg; and in particular,[auto]vs.[noauto]for starters. Thank you for your comments. – DDS Sep 24 '21 at 16:33\@makechapterheade.g. https://tex.stackexchange.com/q/299102/2388 – Ulrike Fischer Sep 24 '21 at 16:42chappg. – DDS Sep 24 '21 at 16:46