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Pairs with common factors: Difference between revisions

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Remove draft tag. Draft for over a year, multiple implementations, little controversy
(Added Algol W)
m (Remove draft tag. Draft for over a year, multiple implementations, little controversy)
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{{draft task}}
 
Generate the sequence where each term '''n''' is the count of the pairs '''(x,y)''' with '''1 < x < y <= n''', that have at least one common prime factor.
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