872 B
		
	
	
	
	
	
	
	
			
		
		
	
	
			872 B
		
	
	
	
	
	
	
	
title
| title | 
|---|
| Counting the number of "hollow" square laminae that can form one, two, three, ... distinct arrangements | 
Problem 174: Counting the number of "hollow" square laminae that can form one, two, three, ... distinct arrangements
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