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Search: id:A088668
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| A088668 |
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Number of n X n matrices over GF(2) with characteristic polynomial x^(n-1) * (x-1). |
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+0
1
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OFFSET
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0,2
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REFERENCES
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I. Reiner, On the number of matrices with given characteristic polynomial, Illinois J. Math. 5 1961 324-329.
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FORMULA
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a(n) = q/(q-1)*(q^(n^2-n)-q^(-2*n+n^2) where q = 2, 3, 4, 5 for this sequence, A088671, A088852, A088853 respectively.
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CROSSREFS
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Sequence in context: A024274 A009612 A009798 this_sequence A066931 A051228 A059116
Adjacent sequences: A088665 A088666 A088667 this_sequence A088669 A088670 A088671
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KEYWORD
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nonn
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AUTHOR
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Yuval Dekel (dekelyuval(AT)hotmail.com0 and W. Edwin Clark (eclark(AT)math.usf.edu), Nov 29 2003
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