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Authors

A. Ross Eckler

Abstract

Leigh Mercer wrote, November 6, 1968: "A 6 by 10 rectangle can be built from the twelve pentominoes (the twelve ways five squares can be put together) in 2,339 different ways. I have drawings of these, and made a card-index of 2,339 cards from the drawings, discovering some interesting things no one else knew. They wouldn't do for WORD WAYS, I fear ..."

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