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A350873
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a(n) is the number of non-isomorphic flexible magmas with n elements (i.e., number of magmas with n elements which satisfy the identity (xy)x = x(yx) for all x and y).
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3
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OFFSET
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0,3
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LINKS
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EXAMPLE
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There are 10 non-isomorphic magmas with 2 elements, and 6 of these are flexible magmas, so a(2) = 6.
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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