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Search: id:A098695
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| A098695 |
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2^[n(n-1)/2] * Prod[k=1..n, k! ]. |
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+0
3
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| 1, 1, 4, 96, 18432, 35389440, 815372697600, 263006617337856000, 1357366631815981301760000, 126095668058466123464363212800000, 234278891648287676839670388023623680000000
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OFFSET
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0,3
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LINKS
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C. Radoux, Determinants de Hankel et theoreme de Sylvester
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CROSSREFS
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Equals A006125 * A000178.
Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 20 2009: (Start)
Equals the absolute values of the row sums of A156921.
(End)
Sequence in context: A111637 A027872 A146514 this_sequence A059201 A027638 A041275
Adjacent sequences: A098692 A098693 A098694 this_sequence A098696 A098697 A098698
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KEYWORD
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nonn
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AUTHOR
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Ralf Stephan, Sep 22 2004
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EXTENSIONS
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I have added a(0)=1. The formula 2^[n(n-1)/2] * Prod[k=1..n, k! ] permits this. Furthermore this is in accordance with the statement: Equals A006125 * A000178. The offset should accordingly be changed to 0. Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 20 2009
Offset changed to 0 and second offset to 3 Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 23 2009
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