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A180213
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Number of permutations of 0..(n-1) representable as 1,2,1-weighted consecutive sums of 3 adjacent elements of a sequence of n+2 nonnegative integers
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0
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1, 2, 4, 6, 12, 36, 102, 324, 972, 3190, 12610, 50254, 214510, 1000260, 4848796, 24798190, 134817190
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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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