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A177646
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Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up.
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0
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1, 1, 70, 34650, 63063000, 302857024681, 3171644273043481, 63767771149790231020, 2246276459710030995597000, 129398739548198780715411006000, 11551019408580550906836084615390361, 1530266028377887010801240993038984544961, 290384391726747532382877490399579938116889720
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OFFSET
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0,3
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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