14 by 14 grid are there which do not cross the railroad tracks, but which visit the diagonal after 6 steps and after 20 steps (a

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter5: Similar Triangles
Section5.4: The Pythagorean Theorem
Problem 38E: When the rectangle in the accompanying drawing whose dimensions are 16 by 9 is cut into pieces and...
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How many blockwalks on a 14 by 14 grid are there which do not cross the railroad tracks, but which visit the diagonal after 6 steps and after 20 steps (and perhaps elsewhere)? 

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