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A179456
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Triangle read by rows: number of permutation trees of power n and height <= n - k.
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3
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1, 1, 2, 1, 6, 5, 1, 24, 23, 9, 1, 120, 119, 68, 14, 1, 720, 719, 517, 152, 20, 1, 5040, 5039, 4163, 1581, 292, 27, 1, 40320, 40319, 36180, 16776, 3917, 508, 35, 1, 362880, 362879, 341733, 186030, 52029, 8489, 823, 44, 1
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OFFSET
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0,3
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COMMENTS
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Partial row sums of A179454 starting from the diagonal. Special case: A179456(n,n-2) = A000096(n) for n > 1.
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LINKS
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EXAMPLE
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1,
1,
2, 1,
6, 5, 1,
24, 23, 9, 1,
120, 119, 68, 14, 1,
720, 719, 517, 152, 20, 1,
5040, 5039, 4163, 1581, 292, 27, 1,
40320, 40319, 36180, 16776, 3917, 508, 35, 1,
362880, 362879, 341733, 186030, 52029, 8489, 823, 44, 1
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CROSSREFS
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KEYWORD
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nonn,tabf
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AUTHOR
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STATUS
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approved
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