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A321063
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Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=7.
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1
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24176, 533544, 16860608, 707767328, 37727416576, 2475764410944, 195463415776768, 18237517555977472, 1982309731660474368, 248048061418810109952, 35377310696428547145728, 5702015244617382235000832, 1030924606332352092323577856, 207727724955575700214833766400
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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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