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A085511
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Determinant of the n X n matrix whose element (i,j) equals sigma(|i-j|) where sigma(n) is the sum of divisors of n and sigma(0) = 0.
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2
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1, 0, -1, 6, 0, -96, 1856, -19866, 194701, -143840, -12421376, -2242688, 7161224400, -182262318208, 4419601227184, -105598371081024, 1963290383833664, -34552138617760368, 6240219707831587, 4597964531722783442, 255030441797039438464, -20656928385327220865224
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OFFSET
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0,4
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LINKS
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MAPLE
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a:= n-> LinearAlgebra[Determinant](Matrix(n,
(i, j)-> numtheory[sigma](abs(i-j)))):
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PROG
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(Sage)
def A085511(n) : return matrix([[0 if i==j else sigma(i-j) for j in range(n)] for i in range(n)]).determinant() # Eric M. Schmidt, May 04 2013
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 19 2003
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EXTENSIONS
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STATUS
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approved
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