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A272719
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Maximal number of steps in a nontouching path on an n X n grid such that each step has a different length.
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1
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OFFSET
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2,1
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COMMENTS
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a(7) >= 22, see illustration in Links.
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LINKS
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EXAMPLE
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An example for a(6)=17:
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. 2 5 7 9 15
3 1 . . 11 17
. . . . . .
. 6 . 12 . .
4 10 . . . .
8 13 . 14 16 18
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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