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A079191
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Number of isomorphism classes of anti-commutative closed binary operations on a set of order n, listed by class size.
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4
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1, 4, 2, 2, 8, 34, 952, 2, 1, 14, 6, 211, 283, 13570, 31843561
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OFFSET
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1,2
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COMMENTS
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Elements per row: 1,2,4,8,16,30,... (given by A027423, number of positive divisors of n!)
First four rows: 1; 4,2; 2,8,34,952; 2,1,14,6,211,283,13570,31843561
A079189(x) is equal to the sum of the products of each element in row x of this sequence and the corresponding element of A079210.
The sum of each row x of this sequence is given by A079190(x).
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LINKS
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CROSSREFS
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KEYWORD
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nonn,tabf
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AUTHOR
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Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003
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STATUS
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approved
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