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A177313
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Number of permutations of 9 copies of 1..n with all adjacent differences <= 1 in absolute value.
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2
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1, 1, 48620, 60110030, 161686253810, 304100156874800, 574996024253854586, 1016915629343040544250, 1745708356607370063330620, 2911820015993491302722966990, 4754502826758413615581742528138, 7626389809822483147908697112197520, 12055478550658617275428327115583119762
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OFFSET
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0,3
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COMMENTS
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a(n) = (9n)!/362880^n = A172613(n) for n<=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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EXTENSIONS
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STATUS
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approved
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