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A079183
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Number of isomorphism classes of non-commutative closed binary operations (groupoids) on a set of order n.
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4
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OFFSET
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1,2
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COMMENTS
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Each a(n) is equal to the sum of the elements in row n of A079184.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003
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EXTENSIONS
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STATUS
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approved
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