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Search: id:A166734
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| A166734 |
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Determinant of the adjacency matrix of the n-cube graph Q_n |
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+0
1
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| 0, -1, 0, 9, 0, 1476225, 0, 32724184981958652351324462890625
(list; graph; listen)
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OFFSET
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0,4
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REFERENCES
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N. Biggs, Algebraic Graph Theory, Cambridge Univ. Press 1974, p.145
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FORMULA
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a(n)=prod(j=0, n, (n-2j)^binomial(n,j)).
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EXAMPLE
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a(3) = (3^1)*(1^3)*((-1)^3)*((-3)^1) = 3*1*(-1)*(-3) = 9.
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CROSSREFS
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Sequence in context: A057403 A157309 A067479 this_sequence A155783 A121935 A070060
Adjacent sequences: A166731 A166732 A166733 this_sequence A166735 A166736 A166737
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KEYWORD
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easy,sign
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AUTHOR
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Franz Vrabec (franz.vrabec(AT)aon.at), Oct 20 2009
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