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A079243 Number of isomorphism classes of associative non-commutative non-anti-associative anti-commutative closed binary operations on a set of order n. 9

%I

%S 0,2,2,3

%N Number of isomorphism classes of associative non-commutative non-anti-associative anti-commutative closed binary operations on a set of order n.

%C A079231(n)+A079233(n)+A079235(n)+A079237(n)+A079196(n)+A079241(n)+A079243(n)+A079245(n)+A063524(n)=A002489(n)

%C Each a(n) is equal to the sum of the elements in row n of A079208.

%H <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a>

%Y Cf. A079208, A079242, A079231, A079233, A079235, A079237, A079196, A079241, A079245, A063524.

%K nonn,more

%O 1,2

%A Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003

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Last modified December 3 12:44 EST 2016. Contains 278734 sequences.