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A152347
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Number of permutations of floor(i*9/5), 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, 672, 4272, 31824, 246996, 2149932, 21512542, 230751100, 2628119680, 32389604418, 427534335774, 6095015439840
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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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