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A152348
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Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 4 adjacent terms unique.
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0
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1, 2, 6, 24, 120, 640, 3924, 28656, 211984, 1841052, 16619224, 170244216, 1872923892, 21777129140, 280485621020, 3762640368156
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OFFSET
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1,2
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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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STATUS
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approved
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