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A177310
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Number of permutations of 8 copies of 1..n with all adjacent differences <= 1 in absolute value.
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2
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1, 1, 12870, 6077196, 5650739930, 3772321496064, 2514046004253110, 1570273521448103668, 951645881858020642746, 560523113474283819256640, 323221203836407773725200718, 183122229346363470922528553652, 102256611847518844993947706000234
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OFFSET
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0,3
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COMMENTS
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a(n) = (8n)!/40320^n = A172609(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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