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A246222
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Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.
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2
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99, 0, 13303, 530432, 2715243, 14872704, 712988175, 2114735616, 14553496947, 22338508875, 9307563626682, 839345640802598, 8486108520773778, 298020352385025000, 10432593658200450596, 210875469472380711300, 944599826416703171100, 12667164470975664000000
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OFFSET
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7,1
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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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