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A246014
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Number of permutations of [n] with every alternating run of length less than 3 in which the last alternating run has length 2.
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1
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0, 0, 1, 1, 4, 16, 70, 385, 2365, 16337, 125870, 1064810, 9829820, 98319221, 1058927507, 12220050571, 150421002736, 1967299266676, 27243141998506, 398221614894397, 6127294825424317, 98992456408509257, 1675478215412320154, 29646991284088234166
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OFFSET
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0,5
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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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