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A trawl through the archive reveals a minimum trio of squares

The minimum Barnetson triad is: 17, 32 and 32, producing the respective squares of 49, 49 and 64.

Paul, who died last year, was a well-known computer...

The minimum Barnetson triad is: 17, 32 and 32, producing the respective squares of 49, 49 and 64.

Paul, who died last year, was a well-known computer systems designer. During his lifetime he made many original discoveries in the field of recreational mathematics.

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This was first published in August 2009

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